Pneumococcal infections.
D000328:Adult; D002353:Carrier State; D002648:Child; D002675:Child, Preschool; D003428:Cross Infection / Q000453:epidemiology; D005260:Female; D006801:Humans; D007223:Infant; D008875:Middle Aged; D011008:Pneumococcal Infections / Q000175:diagnosis* / Q000453:epidemiology / Q000635:transmission