Epidemiological and biological characteristics of the Hong Kong influenza epidemic in Pennsylvania during 1968-1969.
D000041:Absenteeism; D000293:Adolescent; D000328:Adult; D000368:Aged; D000906:Antibodies / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D003168:Complement Fixation Tests; D004196:Disease Outbreaks; D006386:Hemagglutination Tests; D006801:Humans; D007223:Infant; D007251:Influenza, Human / Q000175:diagnosis / Q000453:epidemiology* / Q000276:immunology / Q000382:microbiology / Q000401:mortality; D009975:Orthomyxoviridae / Q000145:classification / Q000302:isolation & purification; D010414:Pennsylvania; D011159:Population Surveillance; D011635:Public Health Administration
D000906:Antibodies