More than 40 of the world’s leading virologists have issued a stark warning about the growing threat of a global H5N1 bird flu pandemic, urging immediate international action to prevent a potential health catastrophe.
In a report published Thursday in The Lancet Regional Health – Americas, the Global Virus Network (GVN) said the deadly H5N1 strain is rapidly evolving and inching closer to human-to-human transmission.
H5N1, a strain of avian influenza historically limited to birds, has in recent years jumped to mammals including pigs and cattle—an alarming shift that scientists say could be a precursor to widespread human infection.
Although only a few human cases have been reported globally, the virus’s mortality rate is cause for deep concern—killing approximately one in every two people infected.
“We are at a critical point. The virus is adapting to mammals,” the report stated.
“If it gains the ability to transmit efficiently between humans, we could face a pandemic far deadlier than COVID-19.”
The report highlighted persistent vulnerabilities in global health systems, despite commitments made during the COVID-19 pandemic to strengthen preparedness. Among the key concerns are poor surveillance at the animal-human interface, weak biosecurity protocols, and fragmented international coordination.
The President of the Global Virus Network, Dr. Christian Bréchot stressed that although global leaders had vowed to improve readiness after COVID-19, many promises remain unfulfilled.
“Influenza viruses are notorious for their ability to jump species,” Bréchot said.
“If a person were to be co-infected with both H5N1 and seasonal flu, particularly during a severe flu season, there is a risk the viruses could combine to form a highly contagious and deadly new strain.”
To address the looming risk, the GVN issued a 10-point action plan urging governments to:
- Accelerate genomic data sharing to track mutations
- Boost vaccine development and stockpiling
- Implement rapid vaccine deployment systems
- Strengthen farm biosecurity to reduce animal-to-human transmission
- Develop comprehensive pandemic preparedness and response plans
- Invest in swift clinical trials for emerging strains
- Improve disease surveillance at local and national levels
- Enhance communication across public health networks
- Coordinate globally, not in isolation
While some officials have described the current H5N1 outbreak among North American dairy cows as “mild,” virologists warn that the virus’s behavior in animals cannot be used to predict its potential impact on humans.
“The human mortality rate for H5N1 has hovered around 50 per cent. Underreacting now could lead to devastating consequences,” Bréchot added.
The GVN emphasized that although it is impossible to predict if or when H5N1 will trigger a pandemic, the current evidence justifies immediate and coordinated global intervention.
“The clock is ticking. Complacency now could cost millions of lives,” the scientists warned.
In Nigeria, experts say the warning is especially relevant given the country’s fragile health system, already stretched thin by recurring outbreaks of Lassa fever and cholera.
A virologist based in Abuja, Dr. Ifeanyi Okeke called on the Federal Government to urgently step up surveillance efforts, particularly at high-risk sites like live bird markets, pig farms, and abattoirs.
“We cannot afford to be caught off guard,” Okeke said, urging collaboration with international partners to ensure Nigeria’s inclusion in vaccine stockpiles and genomic monitoring initiatives.
