President's address. The flux of infection.
D002771:Cholera / Q000453:epidemiology; D003140:Communicable Disease Control; D003141:Communicable Diseases / Q000453:epidemiology*; D004739:England; D005517:Foodborne Diseases / Q000453:epidemiology; D006069:Gonorrhea / Q000453:epidemiology; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology; D008457:Measles / Q000453:epidemiology; D012541:Scarlet Fever / Q000453:epidemiology; D012924:Social Conditions; D013587:Syphilis / Q000453:epidemiology; D014376:Tuberculosis / Q000453:epidemiology; D014852:Wales; D014917:Whooping Cough / Q000453:epidemiology