title: Prophylactic effect of influenza subunit (HA) vaccine in epidemic year 1972-1973.
mesh_terms: D000914:Antibodies, Viral / Q000032:analysis; D000956:Antigens, Viral; D002648:Child; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D007564:Japan; D012621:Seasons; D014611:Vaccination
chemical_list: D000914:Antibodies, Viral; D000956:Antigens, Viral; D007252:Influenza Vaccines