title: Recommended composition of influenza virus vaccines for use in the 2003-2004 influenza season.
mesh_terms: D006801:Humans; D009980:Influenza A virus / Q000276:immunology*; D009981:Influenza B virus / Q000276:immunology*; D007252:Influenza Vaccines / Q000276:immunology*; D007251:Influenza, Human / Q000517:prevention & control* / Q000821:virology
chemical_list: D007252:Influenza Vaccines