This image was captured while a member of the Brazilian Field Epidemiology Training Program (BFETP) team of investigators were conducting interviews with residents in the rural municipality of Alagoas, in northeastern Brazil in July, 2013. It was discovered through interviews, like the one taking place here, that residents presenting with episodes of diarrhea, were later identified as cases linked to an outbreak associated with a lack of drinking water in the region.
The FETP trains workers on the ground to help countries build sustainable capacity for detecting and responding to health threats. The program develops in-country expertise so that disease outbreaks can be detected locally and prevented from spreading. See the link below, for more on the FETP.