Connect with us

Spread & Containment

COVID: antiviral drugs are a vital weapon – but misusing them could backfire

We hear a lot about drug-resistant bacteria. The same thing can happen with viruses.

Published

on

MargJohnsonVA/Shutterstock

The “living with COVID” strategy being pursued by many countries relies heavily on two key pillars. First, that vaccines continue to protect most people from severe disease. And second, that where they don’t, people will receive antiviral treatments. But are the antivirals currently available sufficiently effective, accessible and durable?

Research advances in the realm of antiviral therapies since the pandemic began have been considerable. At the same time, no medicine is perfect. The concern is that if not deployed properly, the effectiveness and longevity of antiviral treatments may be compromised.

So let’s take a look at what’s in the antivirals arms locker, and how we got to this point.


Read more: COVID: WHO recommends two new treatments – here's how they work


In 2020, the priority was drug repurposing (identifying medicines for other conditions that might also benefit COVID patients). Success with drugs like dexamethasone followed. This is a steroid which counters the inflammation that occurs as a result of the body’s overactive immune response during severe COVID.

Things didn’t go as smoothly for direct-acting antivirals, a group of drugs that target the virus directly to suppress infection. So desperate was the situation early in the pandemic that agents like hydroxychloroquine and ivermectin were tested in clinical trials and, predictably, were found wanting.

One promising candidate, however, did emerge during 2020. Remdesivir is a ribonucleotide analogue (or “nuc”) that mimics the building blocks of the virus’ genetic material. It poisons the copying process by not allowing further links to be added to RNA chains. Remdesivir was first developed as a potential cure for hepatitis C.

Despite working well against SARS-CoV-2 (the virus that causes COVID) in pre-clinical settings, initial trials in patients with severe COVID were conflicted.

We now know that COVID can progress fairly quickly from a virus-driven disease to the severe sepsis-like consequences of a misfiring immune response. So direct-acting antivirals must be deployed early. A trial where remdesivir was given to high-risk patients soon after infection found an 87% reduced risk of hospitalisation or death compared with a placebo.

An illustration of SARS-CoV-2, the coronavirus that causes COVID-19.
Direct-acting antivirals need to be given early to be effective against SARS-CoV-2. Kateryna Kon/Shutterstock

Another nuc, molnupiravir, becomes incorporated within RNA chains, generating a drug-laden template that corrupts the next copy. Before the pandemic, molnupiravir had been explored for influenza and other viruses. Against COVID, it reduced the risk of hospitalisation and death, but only by roughly 30%, despite performing well in lab settings.

Paxlovid, produced by Pfizer, combines two different drugs. Nirmatrelvir, a modified version of an antiviral originally developed for SARS, prevents the virus from replicating.

Ritonavir is not an antiviral, but a potent inhibitor of the liver metabolism, allowing nirmatrelvir to persist for longer in the body and act more efficiently. In trials, Paxlovid saw a reduction in hospitalisations and deaths similar to remdesivir.

Paxlovid and molnupiravir are taken orally, whereas remdesivir is administered intravenously. The approval statuses of these direct-acting antivirals varies in different regions, though remdesivir and Paxlovid are available fairly widely. While all three drugs are conditionally approved and currently available in the UK, the availability of molnupiravir is more limited around the world.

Who can access antivirals?

Although vaccines have changed things for the better, multiple health conditions remain associated with higher risk from COVID, and a suboptimal immune response to vaccination. This is why the UK and other countries are primarily directing antivirals towards people who are vulnerable.

You may be prescribed antivirals if you’re hospitalised with COVID (or catch it in hospital). People in the community can access antiviral treatments if they have a specific medical condition which classifies them as extremely vulnerable.

Patient groups and charities have raised concerns about the limited eligibility criteria in the UK, which are narrower than the criteria were for three initial vaccine doses and shielding.

Alternatively, the Panoramic trial, now managed through a network of GPs, accepts people over 50, or younger people with certain medical conditions. However, patients have a 50:50 chance of receiving Paxlovid or molnupiravir versus a placebo.

Should we broaden access?

Increasing eligibility criteria for antivirals would favourably impact upon many vulnerable people’s lives, providing a safety net to allow safer interaction with society. Notwithstanding the results from the Panoramic trial, it may also reduce deaths and severe disease.

But viruses, especially RNA viruses, can develop resistance to single-agent drugs. While relatively rare, it can become established. For example, we saw this with HIV when it was treated with the first antiretroviral drug, AZT.

Remdesivir, molnupiravir and Paxlovid are all single agents (although Paxlovid is made up of two components, only one is an antiviral).

SARS-CoV-2 has developed resistance to remdesivir in the lab. But at this stage, despite widespread hospital use, real-world resistance remains low.

We’ve seen reports of viral relapse or rebound (testing positive to COVID again after direct-acting antiviral treatment) with Paxlovid and molnupiravir. This could be explained by transient resistance, or delayed immune responses, but we don’t know. Pfizer has reported that relapse also occurred in control groups (those in the study not taking the drug for comparison) during Paxlovid trials.

Importantly, viruses are significantly less likely to develop resistance to direct-acting antiviral combinations.

Expanding our antiviral repertoire

We are fortunate to have safe and effective vaccines and therapeutics that lower individual risks of severe COVID. However, our fruitful repurposing of direct-acting antivirals risks being undermined by overuse.

Other agents including favipiravir (an anti-influenza nuc) and oral remdesivir are in the trial pipeline, and may prove useful. Research into new agents should be a priority and combinations of existing agents should be urgently explored. Continuing with just three approved drugs would be short-sighted.


Read more: Developing antiviral drugs is not easy – here's why


The capacity for SARS-CoV-2 evolution is troubling, and will likely blindside us again in the future. Direct-acting antivirals should form an integral part of a multi-layered mitigation strategy in current and future pandemics.

Stephen Griffin is a member of Independent SAGE.

Read More

Continue Reading

Government

Fauci Deputy Warned Him Against Vaccine Mandates: Email

Fauci Deputy Warned Him Against Vaccine Mandates: Email

Authored by Zachary Stieber via The Epoch Times (emphasis ours),

Mandating COVID-19…

Published

on

Fauci Deputy Warned Him Against Vaccine Mandates: Email

Authored by Zachary Stieber via The Epoch Times (emphasis ours),

Mandating COVID-19 vaccination was a mistake due to ethical and other concerns, a top government doctor warned Dr. Anthony Fauci after Dr. Fauci promoted mass vaccination.

Coercing or forcing people to take a vaccine can have negative consequences from a biological, sociological, psychological, economical, and ethical standpoint and is not worth the cost even if the vaccine is 100% safe,” Dr. Matthew Memoli, director of the Laboratory of Infectious Diseases clinical studies unit at the U.S. National Institute of Allergy and Infectious Diseases (NIAID), told Dr. Fauci in an email.

“A more prudent approach that considers these issues would be to focus our efforts on those at high risk of severe disease and death, such as the elderly and obese, and do not push vaccination on the young and healthy any further.”

Dr. Anthony Fauci, ex-director of the National Institute of Allergy and Infectious Diseases (NIAID. in Washington on Jan. 8, 2024. (Madalina Vasiliu/The Epoch Times)

Employing that strategy would help prevent loss of public trust and political capital, Dr. Memoli said.

The email was sent on July 30, 2021, after Dr. Fauci, director of the NIAID, claimed that communities would be safer if more people received one of the COVID-19 vaccines and that mass vaccination would lead to the end of the COVID-19 pandemic.

“We’re on a really good track now to really crush this outbreak, and the more people we get vaccinated, the more assuredness that we’re going to have that we’re going to be able to do that,” Dr. Fauci said on CNN the month prior.

Dr. Memoli, who has studied influenza vaccination for years, disagreed, telling Dr. Fauci that research in the field has indicated yearly shots sometimes drive the evolution of influenza.

Vaccinating people who have not been infected with COVID-19, he said, could potentially impact the evolution of the virus that causes COVID-19 in unexpected ways.

“At best what we are doing with mandated mass vaccination does nothing and the variants emerge evading immunity anyway as they would have without the vaccine,” Dr. Memoli wrote. “At worst it drives evolution of the virus in a way that is different from nature and possibly detrimental, prolonging the pandemic or causing more morbidity and mortality than it should.”

The vaccination strategy was flawed because it relied on a single antigen, introducing immunity that only lasted for a certain period of time, Dr. Memoli said. When the immunity weakened, the virus was given an opportunity to evolve.

Some other experts, including virologist Geert Vanden Bossche, have offered similar views. Others in the scientific community, such as U.S. Centers for Disease Control and Prevention scientists, say vaccination prevents virus evolution, though the agency has acknowledged it doesn’t have records supporting its position.

Other Messages

Dr. Memoli sent the email to Dr. Fauci and two other top NIAID officials, Drs. Hugh Auchincloss and Clifford Lane. The message was first reported by the Wall Street Journal, though the publication did not publish the message. The Epoch Times obtained the email and 199 other pages of Dr. Memoli’s emails through a Freedom of Information Act request. There were no indications that Dr. Fauci ever responded to Dr. Memoli.

Later in 2021, the NIAID’s parent agency, the U.S. National Institutes of Health (NIH), and all other federal government agencies began requiring COVID-19 vaccination, under direction from President Joe Biden.

In other messages, Dr. Memoli said the mandates were unethical and that he was hopeful legal cases brought against the mandates would ultimately let people “make their own healthcare decisions.”

“I am certainly doing everything in my power to influence that,” he wrote on Nov. 2, 2021, to an unknown recipient. Dr. Memoli also disclosed that both he and his wife had applied for exemptions from the mandates imposed by the NIH and his wife’s employer. While her request had been granted, his had not as of yet, Dr. Memoli said. It’s not clear if it ever was.

According to Dr. Memoli, officials had not gone over the bioethics of the mandates. He wrote to the NIH’s Department of Bioethics, pointing out that the protection from the vaccines waned over time, that the shots can cause serious health issues such as myocarditis, or heart inflammation, and that vaccinated people were just as likely to spread COVID-19 as unvaccinated people.

He cited multiple studies in his emails, including one that found a resurgence of COVID-19 cases in a California health care system despite a high rate of vaccination and another that showed transmission rates were similar among the vaccinated and unvaccinated.

Dr. Memoli said he was “particularly interested in the bioethics of a mandate when the vaccine doesn’t have the ability to stop spread of the disease, which is the purpose of the mandate.”

The message led to Dr. Memoli speaking during an NIH event in December 2021, several weeks after he went public with his concerns about mandating vaccines.

“Vaccine mandates should be rare and considered only with a strong justification,” Dr. Memoli said in the debate. He suggested that the justification was not there for COVID-19 vaccines, given their fleeting effectiveness.

Julie Ledgerwood, another NIAID official who also spoke at the event, said that the vaccines were highly effective and that the side effects that had been detected were not significant. She did acknowledge that vaccinated people needed boosters after a period of time.

The NIH, and many other government agencies, removed their mandates in 2023 with the end of the COVID-19 public health emergency.

A request for comment from Dr. Fauci was not returned. Dr. Memoli told The Epoch Times in an email he was “happy to answer any questions you have” but that he needed clearance from the NIAID’s media office. That office then refused to give clearance.

Dr. Jay Bhattacharya, a professor of health policy at Stanford University, said that Dr. Memoli showed bravery when he warned Dr. Fauci against mandates.

“Those mandates have done more to demolish public trust in public health than any single action by public health officials in my professional career, including diminishing public trust in all vaccines.” Dr. Bhattacharya, a frequent critic of the U.S. response to COVID-19, told The Epoch Times via email. “It was risky for Dr. Memoli to speak publicly since he works at the NIH, and the culture of the NIH punishes those who cross powerful scientific bureaucrats like Dr. Fauci or his former boss, Dr. Francis Collins.”

Tyler Durden Mon, 03/11/2024 - 17:40

Read More

Continue Reading

Government

Trump “Clearly Hasn’t Learned From His COVID-Era Mistakes”, RFK Jr. Says

Trump "Clearly Hasn’t Learned From His COVID-Era Mistakes", RFK Jr. Says

Authored by Jeff Louderback via The Epoch Times (emphasis ours),

President…

Published

on

Trump "Clearly Hasn't Learned From His COVID-Era Mistakes", RFK Jr. Says

Authored by Jeff Louderback via The Epoch Times (emphasis ours),

President Joe Biden claimed that COVID vaccines are now helping cancer patients during his State of the Union address on March 7, but it was a response on Truth Social from former President Donald Trump that drew the ire of independent presidential candidate Robert F. Kennedy Jr.

Robert F. Kennedy Jr. holds a voter rally in Grand Rapids, Mich., on Feb. 10, 2024. (Mitch Ranger for The Epoch Times)

During the address, President Biden said: “The pandemic no longer controls our lives. The vaccines that saved us from COVID are now being used to help beat cancer, turning setback into comeback. That’s what America does.”

President Trump wrote: “The Pandemic no longer controls our lives. The VACCINES that saved us from COVID are now being used to help beat cancer—turning setback into comeback. YOU’RE WELCOME JOE. NINE-MONTH APPROVAL TIME VS. 12 YEARS THAT IT WOULD HAVE TAKEN YOU.”

An outspoken critic of President Trump’s COVID response, and the Operation Warp Speed program that escalated the availability of COVID vaccines, Mr. Kennedy said on X, formerly known as Twitter, that “Donald Trump clearly hasn’t learned from his COVID-era mistakes.”

“He fails to recognize how ineffective his warp speed vaccine is as the ninth shot is being recommended to seniors. Even more troubling is the documented harm being caused by the shot to so many innocent children and adults who are suffering myocarditis, pericarditis, and brain inflammation,” Mr. Kennedy remarked.

“This has been confirmed by a CDC-funded study of 99 million people. Instead of bragging about its speedy approval, we should be honestly and transparently debating the abundant evidence that this vaccine may have caused more harm than good.

“I look forward to debating both Trump and Biden on Sept. 16 in San Marcos, Texas.”

Mr. Kennedy announced in April 2023 that he would challenge President Biden for the 2024 Democratic Party presidential nomination before declaring his run as an independent last October, claiming that the Democrat National Committee was “rigging the primary.”

Since the early stages of his campaign, Mr. Kennedy has generated more support than pundits expected from conservatives, moderates, and independents resulting in speculation that he could take votes away from President Trump.

Many Republicans continue to seek a reckoning over the government-imposed pandemic lockdowns and vaccine mandates.

President Trump’s defense of Operation Warp Speed, the program he rolled out in May 2020 to spur the development and distribution of COVID-19 vaccines amid the pandemic, remains a sticking point for some of his supporters.

Vice President Mike Pence (L) and President Donald Trump deliver an update on Operation Warp Speed in the Rose Garden of the White House in Washington on Nov. 13, 2020. (Mandel Ngan/AFP via Getty Images)

Operation Warp Speed featured a partnership between the government, the military, and the private sector, with the government paying for millions of vaccine doses to be produced.

President Trump released a statement in March 2021 saying: “I hope everyone remembers when they’re getting the COVID-19 Vaccine, that if I wasn’t President, you wouldn’t be getting that beautiful ‘shot’ for 5 years, at best, and probably wouldn’t be getting it at all. I hope everyone remembers!”

President Trump said about the COVID-19 vaccine in an interview on Fox News in March 2021: “It works incredibly well. Ninety-five percent, maybe even more than that. I would recommend it, and I would recommend it to a lot of people that don’t want to get it and a lot of those people voted for me, frankly.

“But again, we have our freedoms and we have to live by that and I agree with that also. But it’s a great vaccine, it’s a safe vaccine, and it’s something that works.”

On many occasions, President Trump has said that he is not in favor of vaccine mandates.

An environmental attorney, Mr. Kennedy founded Children’s Health Defense, a nonprofit that aims to end childhood health epidemics by promoting vaccine safeguards, among other initiatives.

Last year, Mr. Kennedy told podcaster Joe Rogan that ivermectin was suppressed by the FDA so that the COVID-19 vaccines could be granted emergency use authorization.

He has criticized Big Pharma, vaccine safety, and government mandates for years.

Since launching his presidential campaign, Mr. Kennedy has made his stances on the COVID-19 vaccines, and vaccines in general, a frequent talking point.

“I would argue that the science is very clear right now that they [vaccines] caused a lot more problems than they averted,” Mr. Kennedy said on Piers Morgan Uncensored last April.

“And if you look at the countries that did not vaccinate, they had the lowest death rates, they had the lowest COVID and infection rates.”

Additional data show a “direct correlation” between excess deaths and high vaccination rates in developed countries, he said.

President Trump and Mr. Kennedy have similar views on topics like protecting the U.S.-Mexico border and ending the Russia-Ukraine war.

COVID-19 is the topic where Mr. Kennedy and President Trump seem to differ the most.

Former President Donald Trump intended to “drain the swamp” when he took office in 2017, but he was “intimidated by bureaucrats” at federal agencies and did not accomplish that objective, Mr. Kennedy said on Feb. 5.

Speaking at a voter rally in Tucson, where he collected signatures to get on the Arizona ballot, the independent presidential candidate said President Trump was “earnest” when he vowed to “drain the swamp,” but it was “business as usual” during his term.

John Bolton, who President Trump appointed as a national security adviser, is “the template for a swamp creature,” Mr. Kennedy said.

Scott Gottlieb, who President Trump named to run the FDA, “was Pfizer’s business partner” and eventually returned to Pfizer, Mr. Kennedy said.

Mr. Kennedy said that President Trump had more lobbyists running federal agencies than any president in U.S. history.

“You can’t reform them when you’ve got the swamp creatures running them, and I’m not going to do that. I’m going to do something different,” Mr. Kennedy said.

During the COVID-19 pandemic, President Trump “did not ask the questions that he should have,” he believes.

President Trump “knew that lockdowns were wrong” and then “agreed to lockdowns,” Mr. Kennedy said.

He also “knew that hydroxychloroquine worked, he said it,” Mr. Kennedy explained, adding that he was eventually “rolled over” by Dr. Anthony Fauci and his advisers.

President Donald Trump greets the crowd before he leaves at the Operation Warp Speed Vaccine Summit in Washington on Dec. 8, 2020. (Tasos Katopodis/Getty Images)

MaryJo Perry, a longtime advocate for vaccine choice and a Trump supporter, thinks votes will be at a premium come Election Day, particularly because the independent and third-party field is becoming more competitive.

Ms. Perry, president of Mississippi Parents for Vaccine Rights, believes advocates for medical freedom could determine who is ultimately president.

She believes that Mr. Kennedy is “pulling votes from Trump” because of the former president’s stance on the vaccines.

“People care about medical freedom. It’s an important issue here in Mississippi, and across the country,” Ms. Perry told The Epoch Times.

“Trump should admit he was wrong about Operation Warp Speed and that COVID vaccines have been dangerous. That would make a difference among people he has offended.”

President Trump won’t lose enough votes to Mr. Kennedy about Operation Warp Speed and COVID vaccines to have a significant impact on the election, Ohio Republican strategist Wes Farno told The Epoch Times.

President Trump won in Ohio by eight percentage points in both 2016 and 2020. The Ohio Republican Party endorsed President Trump for the nomination in 2024.

“The positives of a Trump presidency far outweigh the negatives,” Mr. Farno said. “People are more concerned about their wallet and the economy.

“They are asking themselves if they were better off during President Trump’s term compared to since President Biden took office. The answer to that question is obvious because many Americans are struggling to afford groceries, gas, mortgages, and rent payments.

“America needs President Trump.”

Multiple national polls back Mr. Farno’s view.

As of March 6, the RealClearPolitics average of polls indicates that President Trump has 41.8 percent support in a five-way race that includes President Biden (38.4 percent), Mr. Kennedy (12.7 percent), independent Cornel West (2.6 percent), and Green Party nominee Jill Stein (1.7 percent).

A Pew Research Center study conducted among 10,133 U.S. adults from Feb. 7 to Feb. 11 showed that Democrats and Democrat-leaning independents (42 percent) are more likely than Republicans and GOP-leaning independents (15 percent) to say they have received an updated COVID vaccine.

The poll also reported that just 28 percent of adults say they have received the updated COVID inoculation.

The peer-reviewed multinational study of more than 99 million vaccinated people that Mr. Kennedy referenced in his X post on March 7 was published in the Vaccine journal on Feb. 12.

It aimed to evaluate the risk of 13 adverse events of special interest (AESI) following COVID-19 vaccination. The AESIs spanned three categories—neurological, hematologic (blood), and cardiovascular.

The study reviewed data collected from more than 99 million vaccinated people from eight nations—Argentina, Australia, Canada, Denmark, Finland, France, New Zealand, and Scotland—looking at risks up to 42 days after getting the shots.

Three vaccines—Pfizer and Moderna’s mRNA vaccines as well as AstraZeneca’s viral vector jab—were examined in the study.

Researchers found higher-than-expected cases that they deemed met the threshold to be potential safety signals for multiple AESIs, including for Guillain-Barre syndrome (GBS), cerebral venous sinus thrombosis (CVST), myocarditis, and pericarditis.

A safety signal refers to information that could suggest a potential risk or harm that may be associated with a medical product.

The study identified higher incidences of neurological, cardiovascular, and blood disorder complications than what the researchers expected.

President Trump’s role in Operation Warp Speed, and his continued praise of the COVID vaccine, remains a concern for some voters, including those who still support him.

Krista Cobb is a 40-year-old mother in western Ohio. She voted for President Trump in 2020 and said she would cast her vote for him this November, but she was stunned when she saw his response to President Biden about the COVID-19 vaccine during the State of the Union address.

I love President Trump and support his policies, but at this point, he has to know they [advisers and health officials] lied about the shot,” Ms. Cobb told The Epoch Times.

“If he continues to promote it, especially after all of the hearings they’ve had about it in Congress, the side effects, and cover-ups on Capitol Hill, at what point does he become the same as the people who have lied?” Ms. Cobb added.

“I think he should distance himself from talk about Operation Warp Speed and even admit that he was wrong—that the vaccines have not had the impact he was told they would have. If he did that, people would respect him even more.”

Tyler Durden Mon, 03/11/2024 - 17:00

Read More

Continue Reading

International

The next pandemic? It’s already here for Earth’s wildlife

Bird flu is decimating species already threatened by climate change and habitat loss.

I am a conservation biologist who studies emerging infectious diseases. When people ask me what I think the next pandemic will be I often say that we are in the midst of one – it’s just afflicting a great many species more than ours.

I am referring to the highly pathogenic strain of avian influenza H5N1 (HPAI H5N1), otherwise known as bird flu, which has killed millions of birds and unknown numbers of mammals, particularly during the past three years.

This is the strain that emerged in domestic geese in China in 1997 and quickly jumped to humans in south-east Asia with a mortality rate of around 40-50%. My research group encountered the virus when it killed a mammal, an endangered Owston’s palm civet, in a captive breeding programme in Cuc Phuong National Park Vietnam in 2005.

How these animals caught bird flu was never confirmed. Their diet is mainly earthworms, so they had not been infected by eating diseased poultry like many captive tigers in the region.

This discovery prompted us to collate all confirmed reports of fatal infection with bird flu to assess just how broad a threat to wildlife this virus might pose.

This is how a newly discovered virus in Chinese poultry came to threaten so much of the world’s biodiversity.

H5N1 originated on a Chinese poultry farm in 1997. ChameleonsEye/Shutterstock

The first signs

Until December 2005, most confirmed infections had been found in a few zoos and rescue centres in Thailand and Cambodia. Our analysis in 2006 showed that nearly half (48%) of all the different groups of birds (known to taxonomists as “orders”) contained a species in which a fatal infection of bird flu had been reported. These 13 orders comprised 84% of all bird species.

We reasoned 20 years ago that the strains of H5N1 circulating were probably highly pathogenic to all bird orders. We also showed that the list of confirmed infected species included those that were globally threatened and that important habitats, such as Vietnam’s Mekong delta, lay close to reported poultry outbreaks.

Mammals known to be susceptible to bird flu during the early 2000s included primates, rodents, pigs and rabbits. Large carnivores such as Bengal tigers and clouded leopards were reported to have been killed, as well as domestic cats.

Our 2006 paper showed the ease with which this virus crossed species barriers and suggested it might one day produce a pandemic-scale threat to global biodiversity.

Unfortunately, our warnings were correct.

A roving sickness

Two decades on, bird flu is killing species from the high Arctic to mainland Antarctica.

In the past couple of years, bird flu has spread rapidly across Europe and infiltrated North and South America, killing millions of poultry and a variety of bird and mammal species. A recent paper found that 26 countries have reported at least 48 mammal species that have died from the virus since 2020, when the latest increase in reported infections started.

Not even the ocean is safe. Since 2020, 13 species of aquatic mammal have succumbed, including American sea lions, porpoises and dolphins, often dying in their thousands in South America. A wide range of scavenging and predatory mammals that live on land are now also confirmed to be susceptible, including mountain lions, lynx, brown, black and polar bears.

The UK alone has lost over 75% of its great skuas and seen a 25% decline in northern gannets. Recent declines in sandwich terns (35%) and common terns (42%) were also largely driven by the virus.

Scientists haven’t managed to completely sequence the virus in all affected species. Research and continuous surveillance could tell us how adaptable it ultimately becomes, and whether it can jump to even more species. We know it can already infect humans – one or more genetic mutations may make it more infectious.

At the crossroads

Between January 1 2003 and December 21 2023, 882 cases of human infection with the H5N1 virus were reported from 23 countries, of which 461 (52%) were fatal.

Of these fatal cases, more than half were in Vietnam, China, Cambodia and Laos. Poultry-to-human infections were first recorded in Cambodia in December 2003. Intermittent cases were reported until 2014, followed by a gap until 2023, yielding 41 deaths from 64 cases. The subtype of H5N1 virus responsible has been detected in poultry in Cambodia since 2014. In the early 2000s, the H5N1 virus circulating had a high human mortality rate, so it is worrying that we are now starting to see people dying after contact with poultry again.

It’s not just H5 subtypes of bird flu that concern humans. The H10N1 virus was originally isolated from wild birds in South Korea, but has also been reported in samples from China and Mongolia.

Recent research found that these particular virus subtypes may be able to jump to humans after they were found to be pathogenic in laboratory mice and ferrets. The first person who was confirmed to be infected with H10N5 died in China on January 27 2024, but this patient was also suffering from seasonal flu (H3N2). They had been exposed to live poultry which also tested positive for H10N5.

Species already threatened with extinction are among those which have died due to bird flu in the past three years. The first deaths from the virus in mainland Antarctica have just been confirmed in skuas, highlighting a looming threat to penguin colonies whose eggs and chicks skuas prey on. Humboldt penguins have already been killed by the virus in Chile.

A colony of king penguins.
Remote penguin colonies are already threatened by climate change. AndreAnita/Shutterstock

How can we stem this tsunami of H5N1 and other avian influenzas? Completely overhaul poultry production on a global scale. Make farms self-sufficient in rearing eggs and chicks instead of exporting them internationally. The trend towards megafarms containing over a million birds must be stopped in its tracks.

To prevent the worst outcomes for this virus, we must revisit its primary source: the incubator of intensive poultry farms.

Diana Bell does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

Read More

Continue Reading

Trending