[Serological survey on the incidence of Myxovirus parainfluenzae in the course of respiratory infections in childhood].
D003625:Data Collection; D006801:Humans; D015994:Incidence; D009975:Orthomyxoviridae; D018184:Paramyxoviridae Infections; D012141:Respiratory Tract Infections
INFLUENZA VIRUSES; RESPIRATORY TRACT INFECTIONS