Epidemiologic studies by county health departments.
D016021:Epidemiologic Studies; D006660:Histoplasmosis / Q000453:epidemiology*; D006801:Humans; D013203:Staphylococcal Infections / Q000453:epidemiology*; D013210:Staphylococcus
HISTOPLASMOSIS/epidemiology; STAPHYLOCOCCAL INFECTIONS/epidemiology