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 […]

Click here to view original web page at www.ncbi.nlm.nih.gov