The risk of infection in droplet infections. The influence of overcrowding and prolonged contact on transmission of the diphtheria pathogen.
D002353:Carrier State / Q000175:diagnosis; D002648:Child; D004165:Diphtheria / Q000175:diagnosis*; D004197:Disease Reservoirs; D004812:Epidemiologic Methods; D006801:Humans; D012572:School Health Services