Substantial Antigenic Drift in the Hemagglutinin Protein of Swine Influenza A Viruses.


Abstract The degree of antigenic drift in swine influenza A viruses (swIAV) has historically been regarded as minimal compared to that of human influenza A virus strains. However, as surveillance activities on swIAV have increased, more isolates have been characterized, revealing a high level of genetic and antigenic differences […]

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