title: The epidemiology of viruses: antigenicity and evolution.
mesh_terms: D000941:Antigens; D004196:Disease Outbreaks / Q000276:immunology; D004813:Epidemiology; D014645:Herpesvirus 3, Human / Q000276:immunology; D006801:Humans; D008459:Measles virus / Q000276:immunology; D009109:Mumps virus; D009154:Mutation; D009975:Orthomyxoviridae / Q000276:immunology; D012087:Reoviridae; D014777:Virus Diseases / Q000276:immunology*
chemical_list: D000941:Antigens