title: Recommendation for the composition of influenza virus vaccines for use in 1999.
mesh_terms: D000956:Antigens, Viral / Q000032:analysis; D014943:Global Health; D017408:Guidelines as Topic; D006801:Humans; D009980:Influenza A virus / Q000276:immunology / Q000302:isolation & purification*; D009981:Influenza B virus / Q000276:immunology / Q000302:isolation & purification*; D007252:Influenza Vaccines / Q000145:classification* / Q000494:pharmacology; D007251:Influenza, Human / Q000517:prevention & control*; D012621:Seasons; D017778:Vaccines, Combined / Q000592:standards; D014944:World Health Organization
chemical_list: D000956:Antigens, Viral; D007252:Influenza Vaccines; D017778:Vaccines, Combined