influenza a ( h3n2 ) viruses isolated during 1979 influenza epidemic are characterized by the presence in their hemagglutinins of both antigens similar to those found in previous isolates of the same type and a qualitatively new antigenic determinant also found in the hemagglutinin of h/south australia/1/77 virus .
C0003320
antigens
C0003316
antigenic determinant