title: Influenza virus epidemics: A continuing problem.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000547:Amantadine / Q000627:therapeutic use; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000150:complications / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology* / Q000382:microbiology / Q000473:pathology / Q000517:prevention & control; D008168:Lung / Q000473:pathology; D008875:Middle Aged; D009975:Orthomyxoviridae / Q000472:pathogenicity; D011014:Pneumonia / Q000209:etiology / Q000473:pathology; D012621:Seasons; D014481:United States
chemical_list: D000900:Anti-Bacterial Agents; D007252:Influenza Vaccines; D000547:Amantadine