The first detection of the highly pathogenic H5N9 strain of bird flu in U.S. poultry has raised alarm among health officials. This strain differs from the previously circulating H5N1 virus, which has caused numerous human infections. While low pathogenic versions have existed since the 1960s, the emergence of this highly pathogenic variant is rare globally. Experts suggest it may have developed through genetic reassortment, indicating a potential risk for poultry advancements and the possibility of human transmission, warranting close monitoring.
H5N9 is a highly pathogenic avian flu virus that has been detected in U.S. poultry for the first time, raising concerns about its potential severity.
New subtypes of influenza like H5N9 emerge due to genetic mutations and reassortment processes, which can occur among co-infected hosts.
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