Surveillance in the time of cholera.
Aronson
S M
SM
D002771:Cholera / Q000453:epidemiology*; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D013020:South America / Q000453:epidemiology; D014195:Travel; D014481:United States / Q000453:epidemiology