Mass Poultry Vaccination Linked to Faster Bird Flu Evolution

The avian flu, particularly the H5N1 subtype, is continuing to spread in the U.S., with 67 recorded human infections and one death since the beginning of 2024. A study in Scientific Advances suggests that while mass vaccination of poultry could reduce disease transmission, it may also accelerate viral evolution. The research indicates that unvaccinated poultry are more likely to contract the virus from wild birds, emphasizing the balance needed in vaccination strategies. In Georgia, a recent outbreak has raised concerns about trade implications for chicken exports, while grocery stores are facing supply issues for eggs and chicken due to the virus's impact. Health officials emphasize that, despite the risks, the current threat to humans remains low, urging caution when handling wild birds. Ongoing monitoring and research aim to prepare for any potential human-to-human transmission should the virus evolve.