Serological response to an adsorbed killed trivalent influenza vaccine (including A/New Jersey 8/76 antigen).

The serological evaluation of a trivalent vaccine (A/Victoria 3/75, A/New Jersey 8/76, B/Hong Kong 8/73) has been done by HI and NI tests on 77 paired sera representing all age groups. The percentage of seroconversion induced by the antigens A/Victoria 3/75, A/New Jersey 8/75 and B/Hong Kong 8/73 were 85.95 and 89.6 respectively and the percentage of protective antibodies (greater than 1:40) were 84.4, 72.7 and 80.5 respectively.