Avian Flu: Experts Warn Potential Pandemic Could Surpass COVID-19
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A highly contagious avian influenza virus spreading across the globe poses a significant pandemic threat, potentially exceeding the severity of the COVID-19 crisis if it mutates to transmit efficiently between humans. This warning comes from leading scientists at France’s Pasteur Institute, who emphasize the urgent need for preparedness.
The Growing Threat of Avian Influenza
Highly pathogenic avian influenza, commonly known as bird flu, has already resulted in the culling of hundreds of millions of birds worldwide in recent years, causing substantial disruption to food supplies and driving up consumer prices. While human infections remain relatively rare, experts are increasingly concerned about the virus’s potential to adapt and overcome the species barrier.
“What we fear is that the virus adapts to mammals, and particularly to humans, and becomes capable of being transmitted from person to person, and that virus becomes a pandemic virus,” a senior official at the Pasteur Institute stated. The institute played a crucial role in the early stages of the COVID-19 pandemic, developing and sharing rapid detection tests with the World Health Organization and laboratories globally.
A Unique Vulnerability: Lack of Existing Immunity
A key difference between the current avian flu threat and previous pandemics lies in the absence of pre-existing immunity within the human population. Unlike common seasonal colds caused by H1 and H3 viruses, there are currently no antibodies against the H5 strain of avian influenza that affects birds and mammals. This situation mirrors the early days of the COVID-19 pandemic, when the novel virus encountered a completely naive immune system.
Furthermore, the potential impact of an avian flu pandemic differs from COVID-19 in a concerning way. While COVID-19 disproportionately affected vulnerable populations, common cold viruses – including avian strains – can be fatal even to healthy individuals, including children. “An avian cold pandemic would probably be quite burdensome, potentially even more burdensome than the pandemic we experienced,” the official explained.
Recent Cases and Global Spread
Recent outbreaks have demonstrated the virus’s expanding reach. The H5N1 strain is currently circulating among poultry and dairy cows in the United States, and a confirmed human case of H5N5 emerged in Washington state this month. Tragically, the individual, who had underlying health conditions, succumbed to the virus last week.
Data from the World Health Organization (WHO) reveals a history of human infections, with nearly 1,000 outbreaks reported between 2003 and 2025, primarily in Egypt, Indonesia, and Vietnam. Alarmingly, nearly half (48%) of these cases proved fatal.
Pandemic Risk Remains Low, But Vigilance is Key
Despite these concerns, experts emphasize that the risk of a full-scale human pandemic remains low. Gregorio Torres, president of the World Animal Health Organization’s General Area, offered a reassuring perspective. “We need to be prepared to replicate early enough. But for the moment, you can happily walk in the woods, collect chicken and eggs and enjoy your life. The pandemic risk is a possibility. But in terms of probability, it is still very low,” he said.
Preparedness and Potential Solutions
However, preparedness is paramount. The good news, according to the Pasteur Institute, is that the world is better positioned to respond to a novel avian flu pandemic than it was before COVID-19. “The positive point about cold, compared to COVID, is that we have specific preventive measures. We have candidate vaccines ready and we know how to make a vaccine quickly,” the official noted.
Additionally, existing stockpiles of specific antivirals offer a potential line of defense against the avian virus. These resources, combined with lessons learned from the COVID-19 pandemic, provide a foundation for a more effective response should the virus mutate and become transmissible between humans.
