Brian O’Toole, standing, trains people to help collect data for a study about the spread of HIV/AIDS in Guyana. He credits the network of young helpers for a higher-than-usual rate of response to the questionnaire.
Brian O’Toole, standing, trains people to help collect data for a study about the spread of HIV/AIDS in Guyana. He credits the network of young helpers for a higher-than-usual rate of response to the questionnaire.
