title: Update on influenza activity worldwide and World Health Organization and United States recommendations for influenza vaccine composition for the 1987-1988 season.
mesh_terms: D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology*; D014481:United States; D014944:World Health Organization
chemical_list: D007252:Influenza Vaccines