Tuesday, October 21, 2025

A New Pandemic? Bird Flu Mutations Draw Warning from Health Experts

A genetic analysis of a severe H5N1 case in Louisiana revealed mutations that could enhance the virus’s ability to infect humans, prompting health experts to call for increased vigilance despite low public risk.

The mutations, similar to those found in a British Columbia case, appeared during the patient’s hospitalization and were not present in the infected backyard birds, the Centers for Disease Control and Prevention reported Thursday.

“While this sounds like good news, the H5N1 situation remains grim,” said Dr. Angela Rasmussen, a virologist at the University of Saskatchewan. “There has been an explosion of human cases. The more humans are infected, the more chances a pandemic virus will emerge.”

U.S. health officials have documented 65 human H5N1 infections in 2024, primarily among workers at dairy farms and poultry operations. The Louisiana case marks the only severe infection and the sole instance linked to a backyard flock.

The virus’s spread through dairy cattle has reached 16 states, leading agricultural authorities to implement mandatory milk testing. The CDC has expanded surveillance efforts, including testing of asymptomatic individuals with high-risk exposure and maintaining year-round monitoring of flu variants.

“The pandemic clock is ticking,” said Dr. Michael Osterholm, director of the Center for Infectious Disease Research and Policy at the University of Minnesota. “We just don’t know what time it is.”


Information for this story was found via the sources and companies mentioned. The author has no securities or affiliations related to the organizations discussed. Not a recommendation to buy or sell. Always do additional research and consult a professional before purchasing a security. The author holds no licenses.

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