Summary:
- The H5N1 avian influenza virus has been circulating in birds for decades, but a single mutation could make it a serious threat to humans.
- Researchers have discovered that a specific mutation in the virus's hemagglutinin protein can allow it to bind more easily to human cells, potentially making it more transmissible between humans.
- The findings highlight the importance of closely monitoring the evolution of H5N1 and other influenza viruses to stay ahead of potential pandemic threats.