[Air pollution and influenza epidemic in Sofia].
D000393:Air Pollutants / Q000032:analysis; D000397:Air Pollution; D002031:Bulgaria; D004196:Disease Outbreaks; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*
D000393:Air Pollutants
Luftverunreinigung und Grippeepidemie in Sofia