Epidemiological features of influenza in a town of Romania during 1978.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000914:Antibodies, Viral / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007251:Influenza, Human / Q000175:diagnosis / Q000453:epidemiology*; D008875:Middle Aged; D009975:Orthomyxoviridae / Q000302:isolation & purification; D012383:Romania; D012621:Seasons; D014505:Urban Population
D000914:Antibodies, Viral