title: [Hong Kong epidemic Winter 1968-1969: serological observations].
mesh_terms: D000906:Antibodies / Q000032:analysis; D003168:Complement Fixation Tests; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007251:Influenza, Human / Q000276:immunology*
chemical_list: D000906:Antibodies
vernacular_title: Hongkong-epidemin vintern 1968-69: ROLOGISKA OBSERVATIONER.