H.K. influenza 1969-70. A practice study.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007251:Influenza, Human / Q000150:complications / Q000453:epidemiology* / Q000401:mortality; D008297:Male; D008875:Middle Aged; D014852:Wales