title: Nosocomial influenza A infection.
mesh_terms: D003428:Cross Infection / Q000517:prevention & control / Q000635:transmission*; D006801:Humans; D007114:Immunization; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000517:prevention & control / Q000635:transmission*
chemical_list: D007252:Influenza Vaccines