[Epidemiologic surveillance of influenza. Epidemic outbreaks in Mexico, D.F., in February 1976].
D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D008297:Male; D008800:Mexico
Vigilancia epidemiológica de la influenza. Brote epidémico ocurrido en México, D.F., en febrero de 1976.