Influenza A vaccine and the incidence of otitis media.
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D002675:Child, Preschool; D006801:Humans; D015994:Incidence; D007223:Infant; D009980:Influenza A virus; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000517:prevention & control; D010033:Otitis Media / Q000453:epidemiology*; D014611:Vaccination
D007252:Influenza Vaccines