Clinical presentation of the outbreak of the 1967 influenza epidemic.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007251:Influenza, Human / Q000453:epidemiology*; D008875:Middle Aged; D009975:Orthomyxoviridae / Q000302:isolation & purification; D012141:Respiratory Tract Infections / Q000382:microbiology; D013019:South Africa; D014780:Viruses / Q000302:isolation & purification