El Niño and its health impacts.
D002170:Canada / Q000453:epidemiology; D003141:Communicable Diseases / Q000453:epidemiology* / Q000209:etiology; D004190:Disasters; D004196:Disease Outbreaks / Q000517:prevention & control*; D006304:Health Status; D006801:Humans; D015994:Incidence; D013020:South America / Q000453:epidemiology; D014481:United States / Q000453:epidemiology; D014887:Weather