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Anticipated Influenza/SARS-CoV-2 “Twindemic” Has Not Developed, Says CDC, Much to the Relief of the Nation’s Medical Laboratories

The remarkably low number of influenza diagnoses makes it possible for clinical laboratories to stay focused on COVID-19

One positive note for clinical laboratories this winter is the fact that the number of biological samples being submitted for influenza (flu) testing have dropped significantly. This has given medical laboratories more resources for processing COVID-19 tests.

Dark Daily’s sister publication The Dark Report covered this phenomenon in “Surprise! Many Fewer Cases of Flu in Us, Canada, Europe,” December 7, 2020.

According to a feature published in Nature, the number of samples being submitted to medical laboratories for flu testing has dropped by 61%. More surprisingly, the number of positives has dropped by 98%. The combined flu/COVID-19 “twindemic” that some medical experts feared could crush our healthcare system has not materialized—yet, the Washington Examiner reported.

“In any given winter, hospitals are taxed by the flu,” Brian Garibaldi, MD, a pulmonologist and critical care specialist and Medical Director of the Johns Hopkins Biocontainment Unit told the Washington Examiner. “There’s always a concern that our emergency departments will be overwhelmed, and ICU capacity will be strained [due to the concurrence of flu and COVID-19 outbreaks], particularly with people who have coexisting conditions that then get influenza.”

The 2019-2020 flu season ended earlier than usual, likely because of precautions put in place in the spring to combat the coronavirus pandemic. Most years, the seasonal flu in the US peaks in February and trails off by May, Nature reported in “How Coronavirus Lockdowns Stopped Flu in Its Tracks.”

“Seasonal flu cases in the northern hemisphere usually peak in February and tail off by the end of May,” Nature wrote. “This year, unusually, lab-confirmed cases of influenza dropped precipitously in early April, a few weeks after the coronavirus pandemic was declared on 11 March. The data comes from tests of more than 150,000 samples from national influenza laboratories in 71 countries that report data to FluNet, a global surveillance system.”

Government Leaders and Health Experts Remain Concerned

Despite that encouraging data point, public health experts and political leaders were still concerned. In September, Arizona Governor Doug Ducey said, “The overlap of COVID-19 and flu season presents a perfect storm, and we aren’t taking any chances. We are approaching this fall with a proactive mindset and plan of action to limit the impact of the flu and preserve hospital resources,” the Washington Examiner reported.

The caution was certainly warranted. A normal flu season strains resources, but a severe flu season coupled with a global pandemic could have been disastrous. Luckily, Ducey’s “perfect storm” did not materialize.

chart of flu-season during COVID-19 and years 2016 - 2020 with 4 years of flu data charted by FluNet Response System
Data from the World Health Organization’s FluNet Global Influenza Surveillance and Response System was used by Nature to develop the graphic above. It illustrates how the number of positive Influenza specimens in 2019-2020 declined compared to the previous two years. Some experts believe this is due to protocols implemented to combat the COVID-19 coronavirus by hospitals and clinical laboratories. (Graphic copyright: Nature.)

Why Is There Less Influenza?

So, why is there less flu and other respiratory infections?

Epidemiologist Lisa Lockerd Maragakis, MD, MPH, Associate Professor of Medicine and Senior Director of Infection Prevention at Johns Hopkins Health System, told U.S. News, widespread business and school closures provide fewer opportunities for influenza to spread. “We commonly see flu spread in communities, schools, businesses and through travel each year, so those changes are likely keeping the flu away.”

However, this may have a negative effect as well. Eili Klein, PhD, Associate Professor of Emergency Medicine at Johns Hopkins School of Medicine, warns that “Because of the current restrictions and precautions everyone is taking this season, far fewer people will be infected or exposed to the flu virus, and therefore won’t become immune to certain strains of the virus. So, the number of people who may have more severe infections next year is likely to be greater because immunity will be lower,” the Washington Examiner reported.

Other Viral Infections Also in Decline Due to COVID-19 Precautions, Vaccines

Masking, frequent handwashing, and social distancing certainly played a role in reducing the number of cases of flu reported this year. But influenza is not the only disease that saw reductions. “In Hong Kong, compared with previous years, the number of chickenpox cases dropped by about half to three-quarters,” Nature reported. “In April, cases of measles and rubella were their lowest, globally, since at least 2016, according to data available so far.”

Early in the COVID-19 pandemic, some public health officials were concerned that the decline in influenza cases was actually related to a lack of testing. “However, renewed efforts by public health officials and clinicians to test samples for influenza resulted in adequate numbers tested and detection of little to no influenza virus,” the Centers for Disease Control and Prevention (CDC) reported.

Another factor in the lower numbers of flu cases could be due to the fact that more people have gotten vaccinated this year. More than 188 million flu vaccines were distributed in 2020, an increase compared to the 169 million given in 2019.

“Flu vaccination in the community started earlier this year, as recommended by the CDC, and our community physicians report that vaccine uptake has been higher than usual,” Marie-Louise Landry, MD, Clinical Virologist, Professor of Laboratory Medicine and of Medicine (Infectious Diseases), and Director of the Clinical Virology Laboratory at Yale School of Medicine, told Healthline.

It may also be that influenza diagnoses are fewer because people are not seeking treatment. Hospitals at or beyond capacity due to the pandemic, or fear of contracting COVID-19, may have motivated people with flu-like symptoms to stay home rather than seek treatment. However, most healthcare experts agree that public health measures to fight COVID-19 are likely the larger reason there is less flu.

“Public health measures such as movement restrictions, social distancing, and increased personal hygiene likely had an effect on decreasing influenza and other respiratory virus transmissions,” the World Health Organization (WHO) told Nature.

What About the Next Flu Season?

Experts are more conflicted regarding what all of this means for coming flu seasons. Some experts think that because there’s less flu this year, there will be less immunity next year, and severe illness will result. Others are more optimistic and hope that some strains of flu will disappear, which could mean less flu in the immediate future. It’s not a simple prediction to make.

“A lot of different flus have been circulating in recent years. Are they all going to make it out of this or not? It’s possible that what this season will do is actually make the virological picture a lot simpler. That may be permanent, potentially,” Richard Webby, PhD, an infectious disease scientist at St. Jude Children’s Research Hospital and Director of the World Health Organization Collaborating Center for Studies on the Ecology of Influenza in Animals and Birds, told Nature in “How COVID-19 is Changing the Cold and Flu Season.”

Even if the low flu numbers this year mean some strains do not survive, it is unlikely that will remain the case. “I am sure that flu will come back with a vengeance at some stage in the future,” Robert Ware, PhD, a biostatistician, clinical epidemiologist, and Professor of Biostatistics with Griffith University in Queensland, Australia, told Nature.

Thus, clinical laboratories should remain vigilant for future influenza outbreaks. Hopefully by then the COVID-19 pandemic will have peaked and labs will be able to reallocate testing resources appropriately.

—Dava Stewart

Related Information:

How COVID-19 Is Changing the Cold and Flu Season

How Coronavirus Lockdowns Stopped Flu in Its Tracks

CDC Reports Record-Low Positive Flu Tests

What Happened to the Flu This Year?

Decreased Influenza Activity During the COVID-19 Pandemic—United States, Australia, Chile, and South Africa, 2020

Why Flu Cases Are Down During a Massive Pandemic

Do New Strains of SARS-CoV-2 Coronavirus and Inconsistent Distribution of COVID-19 Vaccines Threaten a Return to Normalcy in 2021? McKinsey Weighs In

The latest McKinsey report addresses when the COVID-19 pandemic is “most likely” to end and what needs to happen to get there

Clinical laboratory leaders, pathologists, and diagnostics professionals everywhere want to know when the SARS-CoV-2 coronavirus will burn itself out. When can we expect to return to normal? Since there is no such thing as a crystal ball, it might be helpful to review the latest report from international management consulting firm McKinsey and Company, titled, appropriately, “When Will the COVID-19 Pandemic End?

It’s a good question, and McKinsey is not certain of the answer. Barring other factors, McKinsey predicts “Transition toward normalcy in the United States remains most likely in the second quarter of 2021 and herd immunity in the third and fourth quarters, but the emergence of new strains and a slow start to vaccine rollout raise real risks to both timelines.” The report also states, “the emergence of more-infectious variants of SARS-CoV-2 increases the risk that this milestone will not be achieved until later.

“More-infectious viruses,” McKinsey continued, “require that a higher percentage of people be simultaneously immune to reach herd immunity. While a more infectious variant likely means more people are acquiring natural immunity through infection (despite ongoing efforts to minimize new cases), the net impact of more-infectious strains is likely to be that a higher portion of the population needs to be vaccinated, which may take more time.”

Challenges That May Slow Herd Immunity to COVID-19

“It is now harder to imagine the United States or United Kingdom transitioning to normalcy before second quarter 2021 or reaching herd immunity before third quarter 2021,” McKinsey added. “Herd immunity to a pathogen is achieved when a sufficient portion of a population is simultaneously immune to prevent sustained transmission.”

But problems in [COVID-19] vaccine distribution, supply shortages, and intermittent participation by the population could push the pandemic endpoint to 2022, cautioned McKinsey.

“We believe herd immunity in the United States is still most likely in third or fourth quarter 2021, but that the chance of delay until first quarter 2022 or beyond has increased,” the report states, “Even later herd immunity remains possible if other challenges arise, especially vaccine safety concerns or ambivalence to vaccination following a transition toward normalcy.”

Other factors that went into the firm’s “most likely” set of possible timelines include:

  • “Unexpected safety issues emerging with early vaccines,
  • “Significant manufacturing or supply-chain delays,
  • “Continued slow adoption,
  • “Further mutation [of the virus],
  • “A shorter-than-anticipated duration of vaccine-conferred immunity.”
Graph from McKinsey and Co. report about covid-19 herd immunity projections into year 2023
The graph above, taken from the McKinsey and Co. report, illustrates how “the probability of reaching COVID-19 herd immunity in the United States is highest in the third or fourth quarter, but could shift.” (Graphic copyright: McKinsey and Company.)

A ‘Transition Toward Normalcy’

In its report, McKinsey notes that “During this transition, controlling the spread of SARS-CoV-2 will still require public-health measures (such as continued COVID-19 testing and mask use in many settings), but mortality will fall significantly, allowing greater normalization of business and social activities.”

In apparent agreement, according to data from the COVID Tracking Project, as of Jan. 27, 2021, 107,444 people were hospitalized in the US with COVID-19, as compared to 130,000 hospital cases on Jan. 13, 2021. Numbers of new cases appear to be dropping, however, McKinsey predicts that “COVID-19 will not disappear during this transition but will become a more normal part of the baseline disease burden in society (like flu, for example), rather than a special threat requiring exceptional societal response.”

It may help that more people are taking one of the vaccines. A recent survey conducted by London-based research and analytics firm YouGov, found that people worldwide are becoming more willing to take the COVID-19 vaccine. For example, in the UK, 80% of those surveyed gave a thumbs-up to getting vaccinated, compared to 61% in November. In the US, however, still only about 45% said they will get the vaccine, up slightly from 42% who said so in July, YouGov reported.

However, McKinsey points out that “vaccine rollout has not yet proceeded far enough to protect much of the population.”

How Should Medical Laboratories and Other Healthcare Providers Proceed?

In “No One Said it Would Be Easy,” Jan. 22, 2021, Becker’s Hospital Review, Michael Dowling, President and CEO of Northwell Health, wrote, “We will be living in a world preoccupied by COVID-19 and vaccination for many months to come … And the stark reality is that the vaccination rollout will continue well into the summer, if not longer, while at the same time we continue to care for hundreds of thousands of Americans sickened by the virus. Despite the challenges we face now and in the coming months in treating the disease and vaccinating a US population of 330 million, none of us should doubt that we will prevail.”

“To achieve that,” McKinsey notes, “we will need to see significant progress on the epidemiological end point … Favorable findings on natural and cross-immunity would help accelerate timelines.

“Five additional criteria will also contribute to the transition to a form of normalcy—the more of these that are achieved, the faster the milestone is likely to be reached:

  • “Continued improvement by governments in the application of public-health interventions (such as test and trace) that don’t significantly limit economic and social activities.
  • “Compliance with public-health measures until we achieve herd immunity.
  • “Accurate, widely available, rapid testing that effectively enables specific activities.
  • “Continued advancements in therapeutics (including pre- and post-exposure prophylactics) for and clinical management of COVID-19, leading to lower infection-fatality ratios—substantial progress has already been made through a combination of effective drugs, such as Dexamethasone and Remdesivir, and changes in clinical management.
  • “Public confidence that there aren’t significant long-term health consequences for those who recover from COVID-19.”

Finally, McKinsey notes that “Both the epidemiological and normalcy ends to the COVID-19 pandemic are important. The transition to the next normal will mark an important social and economic milestone, and herd immunity will be a more definitive end to the pandemic. In the United States, while the transition to normal might be accomplished sooner, the epidemiological end point looks most likely to be reached in the second half of 2021.”

It is not clear when clinical laboratories and pathologists will know for certain when the pandemic’s end point has been reached. Predictions coming from sources such as McKinsey’s latest report may be as close as we get to a crystal ball view of the pandemic’s future.

—Donna Marie Pocius

Related Information:

When Will the COVID-19 Pandemic End?

International Study How Many People Will Take COVID-19 Vaccine

Pandemic Will Not End for Anyone Until it Ends for Everyone

No One Said It Would Be Easy

New Test Under Development That Detects Breast Cancer within One Hour with 100% Accuracy Has Potential to Help Pathologists Deliver More Value

Such a test, if proved safe and accurate for clinical use, could be a useful diagnostic tool for anatomic pathologists

What would it mean to anatomic pathology if breast cancer could be diagnosed in an hour from a fine needle aspiration (FNA) rather than a core biopsy? A new test created by researchers affiliated with Massachusetts General Hospital in Boston may be just such a game changer. Especially in remote locations where clinical laboratory resources are in short supply.

Regardless of how the next round of research and clinical studies turn out, one reason this development is significant is that it demonstrates how newer technologies and analytical software are being combined to create a faster diagnostic test for different types of cancer.

Another benefit to this research is that it may utilize simpler, less expensive instruments. In fact, the researchers said this test can be performed for about $5. For these reasons, pathologists may want to follow the progress of these researchers as they work to improve this test so it can be used in clinical care.

Affordable Image Cytometry of FNA Specimens

Though still in development, the new image cytometry system, dubbed CytoPAN, has demonstrated the ability to diagnose breast cancer within a one-hour time frame, and, according to the study published in Science Translational Medicine, “is devoid of moving parts for stable operations, harnesses optimized antibody kits for multiplexed analysis, and offers a user-friendly interface with automated analysis for rapid diagnoses.”

The international researcher team included scientists from:

“Here, we report the development and validation of an affordable image cytometry system that allows automated and same-day molecular analyses of fine needle aspiration (FNA) specimens. Termed CytoPAN, for portable fluorescence-based image cytometry analyzer, the system performs multichannel imaging for cancer diagnosis and subtyping,” the researchers wrote.

The CytoPAN technique is minimally invasive, they note, and only requires a few cellular specimens to determine if breast cancer cells are present, with results available in one hour.

CytoPAN rapid diagnostic tool for cancer diagnosis.
The researchers are hopeful the CytoPAN diagnostic tool (above) can be a valuable resource in developing countries and remote areas where patients face long wait times before receiving a cancer diagnosis. In these areas, diagnoses typically come after advanced symptoms, such as palpable mass lesions and malaise, become present, which can have a negative impact on patient outcomes. And anatomic pathologists worldwide would benefit greatly from such an advance in cancer diagnostics. (Photo copyright: Jouha Min, Lip Ket Chin Center for Systems Biology, Massachusetts General Hospital.)

“Unfortunately, in many low- and middle-income countries, [breast cancer] diagnosis often takes an extraordinarily long time—up to a few months—due to a lack of specialists and limited laboratory infrastructure,” Hyungsoon Im, PhD, Assistant Professor at Harvard Medical School and one of the researchers involved in the project, told United Press International (UPI).

“From a public health aspect, it is critically important to develop new diagnostic methods that overcome these barriers,” he added.

Because FNA testing is less invasive than surgical biopsy collection, it has fewer complications and is generally considered safe. Thus, it is “feasible to be performed even in resource-limiting settings at much lower costs,” Im told UPI. “This could lead to earlier treatment and accelerate new drug testing in clinical trials.”

CytoPAN Testing and Additional Trials

The researchers tested CytoPAN on 68 breast cancer patients in South Korea.

“To determine the clinical utility of the approach,” they wrote in the published study, “we next conducted a prospective clinical study in which the FNA could be directly compared to conventional pathology results. We enrolled treatment-native patients at the Kyungpook National University Chilgok Hospital (Daegu, South Korea) and who were referred for primary surgery. All patients consented to have a preoperative breast FNA before clinically indicated surgery. The breast masses were visualized by ultrasound or computed tomography, and a coaxial needle was introduced through which FNA samples (CytoPAN) and core biopsies were obtained. Surgical specimens and/or core biopsies were processed by routine pathology and served as the gold standard.”

The CytoPAN platform detected the presence of breast cancer cells with a 100% accuracy, using as few as 50 harvested cells per collected specimen.

The test also successfully identified two key breast cancer biomarkers:

 “We are also preparing additional trials in the US and other countries,” Im told UPI. “The success in those trials will (hopefully) accelerate … widespread adoption of the technology.”

The researchers are currently testing CytoPAN on a larger number of patients in Botswana, with funding from the US federal National Institutes of Health (NIH).

According to the American Cancer Society (ACS), approximately 300,000 individuals are diagnosed with breast cancer annually in the US. The Union for International Cancer Control (UICC) states on their website that, globally, there are more than two million new cases of breast cancer diagnosed each year. And more than 600,000 people died from breast cancer worldwide in 2018. A disproportionate number of those deaths occurred in developing countries that have limited resources to diagnose and treat the disease.

Additional Research for Other Applications in Cancer Testing and Pathology

The new CytoPAN technology requires minimal training, according to the researchers, and only costs about $5 per test kit. This is substantially less expensive than the price associated with other tests available on the market, UPI noted.

Though additional research and clinical trials are needed before CytoPAN will be available for widespread clinical use, a cost-effective, relatively non-invasive test that can accurately diagnose cancer within an hour would be transformational for anatomic pathology and, potentially, could save many lives.

—JP Schlingman

Related Information:

CytoPAN—Portable Cellular Analyses for Rapid Point-of-care Cancer Diagnosis

System Provides ‘Faster, Less Invasive’ Method for Breast Cancer Detection

Cheap, Fast Breast Cancer Test 100% Accurate, Study Finds

Autopsies Clearly Help Pathologists Understand COVID-19 and How It Affects the Body, So Why Are More Not Being Performed?

Payers are unwilling to reimburse for autopsies despite the fact that autopsies are a proven way to learn more about new diseases and how they attack the human body

Each year, less money is spent by Medicare and private health insurers on autopsies. However, autopsies regularly provide pathologists with relevant, clinically useful information about exact causes of death and other elements of disease in the deceased. Some diseases cannot be identified any other way but by autopsy. And data from autopsies have helped developers bring critical new medical laboratory tests, therapeutic drugs, and vaccines to market.

Thus, the healthcare system is losing valuable research that would bring a better understanding of diseases and processes in the body that contribute to poor health and death. This is true with COVID-19. Autopsy results have already provided revelations into how the SARS-CoV-2 coronavirus affects the body, and yielded clues that are helping pathologists combat the illness.

Looking Closely at Death from COVID-19

“You can’t treat what you don’t know about,” Alex Williamson, MD, an anatomic/clinical/pediatric/forensic pathologist at Northwell Health in New York and Associate Professor of Pathology at Zucker School of Medicine at Hofstra/Northwell, told the Associated Press (AP), ABC News reported in “The Autopsy, a Fading Practice, Revealed Secrets of COVID-19.”

“Many lives have been saved by looking closely at someone’s death,” he added.

Autopsies performed on deceased patients could help clarify why there is such a wide array of symptoms for those affected by COVID-19 and provide details that cannot be detected in living patients.

For example, autopsies completed early in the pandemic confirmed that the SARS-CoV-2 coronavirus causes respiratory disease, and that extended use of ventilators could cause considerable damage to the lungs, the AP article noted. This discovery led physicians to re-evaluate how ventilators should be used on COVID-19 patients.

The AP story also stated that pathologists learned the SARS-CoV-2 coronavirus may spread the illness to other organs such as the heart, brain, liver, kidneys, and colon.

Through autopsies, COVID-19 patients also were discovered to have dramatic blood clotting issues in almost every organ of the body and micro-clotting in the lungs.

“The clotting was not only in the large vessels but also in the smaller vessels,” said Amy Rapkiewicz, MD, an anatomic and forensic pathologist, Chair of the Department of Pathology at NYU Langone Medical Center and Associate Professor, Department of Pathology at NYU Long Island School of Medicine, in an Advisory Board Daily Briefing. “And this was dramatic, because though we might have expected it in the lungs, we found it in almost every organ that we looked at in our autopsy study.”

Doctors are now exploring whether blood thinners should be utilized to prevent blood clots from forming in COVID-19 patients.

Lab samples and Amy Rapkiewicz, MD, Chair of the Department of Pathology at NYU Langone Medical Center and Associate Professor, Department of Pathology at NYU Long Island School of Medicine
“When you’re able to see what’s happening at the level of the cells, you just have a broader picture of the potential mechanism by which the disease is happening,” Amy Rapkiewicz, MD (above), Chair of the Department of Pathology at NYU Langone Medical Center and Associate Professor, Department of Pathology at NYU Long Island School of Medicine, told Undark. (Photo copyright: Associated Press.)

Autopsies Identify Secondary Causes of Death

Autopsies also have shown that some COVID-19 patients are dying from secondary bacterial infections that appear alongside the disease. This discovery may help doctors understand lingering symptoms that plague some coronavirus patients.

“What you see at autopsy represents an effective catalogue of the injury that occurs in patients who have COVID,” pathologist Stephen Hewitt, MD, PhD, associate research physician, Laboratory of Pathology, and head of the Experimental Pathology Laboratory at the National Cancer Institute Center for Cancer Research, told Undark. “And it gives you an understanding and a basis to try and forecast forward what we’re going to see in post-COVID syndrome.”

Shortage in Funding and Forensic Pathologists

With advances in technology, clinical laboratory testing, and imaging scans, autopsies are performed much less than they were in the past. In the 1950s, autopsies were performed on about half of the patients who passed away in hospital situations, but now that number is somewhere between only five and 11%, ABC News reported.

At this time, hospitals are not required to provide autopsy services and the costs to perform autopsies are often not covered by private or government insurance.

“As medicine has become closer to the bottom line, community hospitals don’t want to perform the autopsies because they’re not getting any functional reimbursement for them,” Hewitt told Undark.

Hospitals usually have to cover costs associated with autopsies themselves or pass those expenditures along to the deceased patient’s family. Autopsies typically cost anywhere from $1,000 to $5,000 per patient, Undark reported.

“When you consider there’s no reimbursement for this, it’s almost an altruistic practice,” Billie Fyfe-Kirschner, MD, a pathologist with Rutgers University, told the Associated Press. “It’s vitally important, but we don’t have to fund it.”

According to the AP, the US faces a critical shortage of forensic pathologists who are trained to perform autopsies. It is estimated, AP reported, that “the US has only a few hundred forensic pathologists but could use several thousand—and less than one in 100 graduating medical school students enters the profession each year.”

Clearly, pathologists have much to offer in the field of autopsies. Autopsying patients who died from COVID-19 may provide data that could greatly affect treatment for those diagnosed with the disease and improve patient outcomes overall.

—JP Schlingman

Related Information:

The Autopsy, a Fading Practice, Revealed Secrets of COVID-19

Collection and Submission of Postmortem Specimens from Deceased Persons with Confirmed or Suspected COVID-19

Autopsy Rates Were Falling for Years. Then COVID-19 Came Along

What Dozens of COVID-19 Patient Autopsies Have Revealed About the Disease

Autopsies in Maryland Show Much Higher Rate of COVID-19 than Expected

Dirty, Smelly, Raw: The Future of Forensic Pathology

Coveted Blue Horseshoe Crab Blood is Keeping COVID-19 Vaccinations Free of Deadly Endotoxins, But Demand for This Blood Could Have Implications for Supply of Certain Clinical Laboratory Tests

Pathologists may be interested to learn that though a substitute for horseshoe crab blood has been available for nearly 20 years, it has not been widely adopted in the US

Since the 1970s, the blue blood of the horseshoe crab has saved countless human lives by detecting deadly toxins in medical products, as well as its use in a number of medical laboratory tests. Now, that unique blood is playing a vital role in the fight against COVID-19 as well, by enabling pharma companies to ensure the coronavirus vaccines they are giving are free of bacterial contaminants—such as endotoxins—that can harm or kill patients.

Microbiologists and clinical laboratory scientists are familiar with the Endotoxin Activity Assay (EAA), which uses LAL as a way to detect if a critically-ill patient may have whole blood endotoxemia. Published studies show that the detection of elevated endotoxin activity levels is associated with an increased disease severity in patients with sepsis and septic shock.

Horseshoe crab blood is an opaque blue color due to its high copper content. The blood contains limulus amebocyte lysate or LAL (pronounced “el-ay-el”), which either clots or changes color in the presence of bacterial endotoxins. LAL has become the standard to test the safety of many medical devices and pharmaceuticals—including coronavirus vaccines. There are currently no other tests that can analyze the purity of medications and cleanliness of medical devices with the same accuracy as the LAL test.

“The crabs live only on the east coasts of Asia and North America,” Yahoo News reported. “The world’s largest population of American horseshoes winters off Maryland shores and spawns each spring in Delaware Bay. The latest trawl survey puts this population at more than 14 million mature crabs.”

Futuristic Clean Rooms for Extracting Blood

After the crabs are dredged from the ocean floor, or captured as they come ashore for breeding, they are transported to one of a handful of facilities authorized to perform the bleeding process. Once there, the horseshoe crabs are cleaned and sterilized, suspended upside down, and inserted with a needle which extracts approximately one third of their blood.

“These things are being produced in ‘clean rooms’ that look like the stuff they make microchips in,” Glenn Gauvry, Founder and President of the Ecological Research and Development Group Inc. (ERDG) told Yahoo News. ERDG is a 501(c)3 non-profit wildlife conservation organization. Its primary focus is the conservation of the world’s four horseshoe crab species.

bleeding horseshoe crabs in a laboratory for covid-19 testing chemicals
In futuristic-looking labs (above), technicians withdraw the prized blood cells from the tubular heart of the crab and then spin the blood in a centrifuge to isolate the LAL. The resulting product is then sold as endotoxin test kits to pharmaceutical companies that test medical and clinical laboratory supplies, including COVID-19 vaccines. (Photo copyright: Popular Mechanics.)

Certain laboratory tests developed from horseshoe crab blood are used to detect bacterial contamination in everything from heart stents, saline drips, and flu shots, to surgical implants such as pacemakers and prosthetic devices.

Federal law mandates that any medical device that is inserted or injected into a human body must pass the LAL test for contamination. This makes horseshoe crab blood vital for ensuring the new COVID-19 vaccinations are free of potentially-deadly toxins.

“Without LAL, you’re not going to be able to produce the billions of inoculations that are going to have to come about to handle this pandemic,” John Tanacredi, PhD, Professor of Earth and Environmental Sciences, Department of Biology, Chemistry and Environmental Studies at Molloy College, told CBS News.

A $60 Million/Year Industry

Once the LAL has been withdrawn, the crabs are returned to the wild. The horseshoe crabs typically spend one to three days in the lab while the LAL is extracted. They can survive out of water for up to four days, as long as their gills stay moist.

The crabs are then returned to the fishermen who originally caught them, to be gently placed back into the sea. “We treat these crabs like babies,” Yahoo News reported one fisherman saying. “Blue bloods save lives,” said another fisherman.

The Atlantic States Marine Fisheries Commission estimates that in 2019 labs extracted blood from approximately 640,000 horseshoe crabs in the US. Researchers estimate the industry makes about $60 million per year and that the coveted blue blood is worth about $60,000 per gallon, Yahoo News reported.

There are only four labs in the US authorized to extract blood from the horseshoe crabs. They are located in Maryland, Virginia, South Carolina, and Cape Cod. In Maryland, only three trawlers hold permits to catch the horseshoe crabs from the waters surrounding that state.

“We have a 450 million-year-old creature that for the last 45 years has improved the safety of medicines for humans and animals,” John Dubczak, Director of Operations at Charles River Laboratories, told CBS News.

Allen Burgenson, Global Subject Matter Expert-Testing Solutions, Lonza Walkersville, a division of Lonza Bioscience, told Yahoo News “the [pharmaceutical] industry produces enough tests in one day to screen five billion doses of coronavirus vaccine.”

Synthetic Substitute for Horseshoe Crab Blood Available, But Not Widely Used in US

In response to pressure from conservation groups, researchers in Singapore successfully cloned the blood of horseshoe crabs and developed a synthetic test for endotoxins. The synthetic test, known as Recombinant Factor C (rFC), has been commercially available since 2003 and in some countries in Europe is accepted as equal to tests using horseshoe crab blood. However, rFC has not yet been approved for widespread use in the US.

“You’ve got a very large, biomedical bleeding industry with a vested interest in keeping those horseshoes crabs coming in and basically protecting this monopoly,” Ryan Phelan, co-founder and Executive Director of Revive and Restore, a wildlife conservation group based in California that lobbied for the synthetic, told Yahoo News.

In 2017, Dark Daily reported on the potential threat to horseshoe crabs due to blood harvesting. In “Medical Laboratories Could Be Threatening the Survival of Horseshoe Crabs,” we noted growing concerns that the biomedical industry was having a negative impact on the horseshoe crab population. Since then, not much movement has been made toward establishing the synthetic as the standard test in the US.

Recombinant Factor C might eventually eliminate the need to harvest blood from living creatures. But for now, horseshoe crabs continue to provide a critical component for safeguarding humans against contaminants in medical supplies and pharmaceuticals, including COVID-19 vaccinations.

According to Dubczak, the LAL test “has unequivocally elevated the quality and safety of injectable pharmaceutical drugs and medical devices, and that includes all of the vaccines that protect us,” he told USA Today.

—JP Schlingman

Related Information:

How the Coronavirus Vaccine Relies on Maryland’s Strangest Fishery: Horseshoe Crabs

Horseshoe Crabs have a Vital Role in the Development of a Coronavirus Vaccine. Here’s Why

Horseshoe Crabs Help Keep Vaccines Safe. Now, They’re in Big Trouble

Endotoxin Activity Assay for the Detection of Whole Blood Endotoxemia in Critically Ill Patients

The Atlantic Horseshoe Crab and COVID-19

USP Provides Guidelines for Recombinant Factor C (rFC) a Non-animal-derived Reagent Critical to Development of Vaccines and other Sterile Pharmaceutical Products

Horseshoe Crab Anatomy

Why This Crab’s Blood Could Save Your Life

Saving the Horseshoe Crab: A Synthetic Alternative to Horseshoe Crab Blood for Endotoxin Detection

Medical Laboratories Could Be Threatening the Survival of Horseshoe Crabs

Walmart Health Opens Two Primary Care Clinics at Retail Supercenters in Chicago with Plans to Open Seven Florida Locations in 2021

Walmart may be the largest, but it is not the only retailer offering clinical laboratory testing and primary care services at conveniently-located retail stores

Earlier this month in “How Walmart Plans to Take Over Health Care,” CNBC asked, “Is Walmart the future of healthcare?” Good question. In the midst of the COVID-19 pandemic, Walmart (NYSE:WMT) managed to open six Walmart Health locations in Georgia and Arkansas. In addition, the giant retailer announced plans to open more primary care clinics at Walmart Supercenters in Chicago and Florida.

Clinical laboratory managers who struggle to keep revenues flowing should take notice. These retail clinics may not have their own medical laboratories, but their primary care physicians will be generating lab specimens.

And because Walmart offers medical laboratory tests at these locations, with so many people opting to visit health clinics installed within retail stores, independent clinical labs could see a noticeable drop in business as Walmart Health expands its network across the US.

Therefore, clinical labs near Walmart Health locations would be wise to develop strategies and services toward becoming a lab test provider to these retail clinics.

Walmart Health Eyes Florida Primary Care Market

“The past few months in particular have exposed the vulnerabilities of our healthcare system and left many without access to adequate health resources,” said Lori Flees, Senior Vice President and Chief Operating Officer, Walmart US Health and Wellness, in a blog post. “We know our customers need us more than ever, which is why we’re announcing an expansion of Walmart Health.

“We’re planning to open seven Walmart Health locations in the Jacksonville [Florida] market in 2021, with at least one opening in early 2021, and we’re beginning conversations in the Orlando and Tampa markets. Our new health centers will be in communities in need of affordable, accessible preventive care, which we will help deliver through Walmart Health,” Flees wrote.

Exterior and interior images of Walmart Health Clinic with customers sitting on a blue couch in the lobby
Walmart could be operating 22 Walmart Health locations like that shown above in Georgia, Florida, Arkansas, and Illinois by the end of 2021, Fierce Healthcare reported. This means Walmart Health may double its locations by the end of this year. Clinical laboratories near these locations may want to reach out and offer lab testing services to these retail clinics. Notice that, in the picture of the exterior of a Walmart Health clinic, “Labs” is a service that is prominently displayed as one of the important clinical services offered at that site. (Photo copyright: Walmart.)

Can Clinical Laboratories Compete or Collaborate with Walmart?

A news release announcing the opening of the Walmart Health Centers in Chicago stated that Walmart Health partners with “local, on-the-ground health providers to deliver primary care, labs, x-ray and diagnostics, counseling, dental, and hearing services all in one facility at transparent pricing regardless of a patient’s insurance status.”

However, clinical laboratories wanting to be a testing provider to Walmart Health may have to keep their costs of tests and services down in order to be competitive.

As Dark Daily reported in “Walmart Opens Second Health Center Offering Clinical Laboratory Tests and Primary Care Services,” Walmart Health’s lab test prices—in conjunction with primary care services—are low. Some of those tests include:

  • Primary care physician office visit – $40
  • Lipid – $10
  • Hemoglobin A1c – $10
  • Pregnancy Test – $10
  • Flu Test – $20
  • Strep Test – $20
  • Mono Test – $20

Walmart Health’s “Summary Price List” provides a complete list of medical laboratory tests and services offered at the retail clinics.

Other Primary Care Disruptors

Walmart is not the only retailer offering primary care services amid the COVID-19 pandemic.

Walgreens Boots Alliance (NASDAQ:WBA) partnered with VillageMD, a provider of primary care services, to open 500-700 “Village Medical at Walgreens” primary care clinics “in more than 30 US markets in the next five years, with the intent to build hundreds more thereafter,” according to a news release.

Exterior image of Village Medical at Walgreens primary care site medical clinic
By end of summer 2021, 40 “Village Medical at Walgreens” primary care sites (above) are expected to open in Texas, Arizona, and Florida, according to a January 2021 news release. Walgreens is investing $1 billion over three years in the clinics, which will be situated near its stores. “Through these conveniently located clinics at our neighborhood stores, we will uniquely integrate the pharmacist as a critical member of VillageMD’s multi-disciplinary care team to provide patients with personalized and coordinated care,” said Stefano Pessina, Walgreens Executive Vice Chairman and CEO, in the news release. (Photo copyright: Walgreens Boots Alliance.)

Meanwhile, Forbes reported that CVS Health is intent on opening 1,500 more HealthHUB locations in its stores during 2021. In “Walgreens, CVS Add New Healthcare Services and Technology to Their Retail Locations; Is Medical Laboratory Testing Soon to Be Included?Dark Daily reported on CVS Health’s pilot program to test several HealthHUB locations in Houston that would offer expanded Minute Clinic services. These services include:

  • medical laboratory blood testing,
  • health screening,
  • telehealth visits,
  • durable medical and sleep apnea equipment, and
  • wellness programs.

Clinical laboratory managers and pathologists will want to be on the alert for opportunities to forge relationships with Walmart Health, Walgreens, and CVS Health to capture new primary care-related testing business coming out of these non-traditional healthcare providers.

—Donna Marie Pocius

Related Information:

How Walmart Plans to Take Over Health Care

Two Newly Remodeled Chicago Supercenters Introduce Walmart Health

One Year In, Walmart Health is Delivering Affordable Healthcare and Expanding

Walmart Health Opens Two More Locations in Chicago

Walmart to Expand Health Centers to Florida Next Year

Walmart to Launch Healthcare Supercenters in Lucrative Florida Market

Walmart Health Expands to Florida Bringing Affordable and Accessible Care to Local Communities

Walgreens Boots Alliance Accelerates VillageMD Investment and Large-scale Rollout of Primary Care Clinics

CVS HealthHUB Openings on Track Despite Pandemic

CVS Health Debuts HealthHUB Locations to Serve Greater Houston Community

Walmart Opens Second Health Center Offering Clinical Laboratory Tests and Primary Care Services

Walgreens, CVS Add New Healthcare Services and Technology to Their Retail Locations; Is Medical Laboratory Testing Soon to Be Included?

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