New, emerging, and re-emerging infectious diseases.
D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology; D000569:Americas / Q000453:epidemiology; D003141:Communicable Diseases / Q000453:epidemiology*; D003457:Cryptosporidiosis / Q000453:epidemiology; D004196:Disease Outbreaks; D015658:HIV Infections / Q000453:epidemiology; D006801:Humans; D011314:Preventive Health Services; D014777:Virus Diseases / Q000453:epidemiology