THE MECHANISM OF ANTIGENIC DRIFT IN INFLUENZA VIRUSES: ANALYSIS OF HONG KONG (H3N2) VARIANTS WITH MONOCLONAL ANTIBODIES TO THE HEMAGGLUTININ MOLECULE

THE MECHANISM OF ANTIGENIC DRIFT IN INFLUENZA VIRUSES: ANALYSIS OF HONG KONG (H3N2) VARIANTS WITH MONOCLONAL ANTIBODIES TO THE HEMAGGLUTININ MOLECULE