Opportunistic infections update.
D017088:AIDS-Related Opportunistic Infections / Q000453:epidemiology*; D003586:Cytomegalovirus Infections / Q000453:epidemiology; D006526:Hepatitis C / Q000453:epidemiology; D006801:Humans; D015270:Mycobacterium avium-intracellulare Infection / Q000453:epidemiology; D011020:Pneumonia, Pneumocystis / Q000453:epidemiology; D014481:United States / Q000453:epidemiology