Two surface proteins, HA and NA, determine the antigenic properties of influenza virus strains. In 1958, a new strain of influenza A with different HA and NA was identified and antigenic shift was ...
A single mutation in the surface protein of the highly pathogenic avian influenza (HPAI) H5N1 influenza virus could allow for easier human transmission.
A single modification in the protein found on the surface of the highly pathogenic avian influenza (HPAI) H5N1 influenza virus currently circulating in U.S. dairy cows could allow for easier ...