Fig. 1
Annual number of houses sprayed with dichloro-diphenyl-trichloroethane (DDT) in Brazil between 1945 and 1997. Data for the years 1945–1959 and 1965–1986 were obtained from the Brazilian Institute of Geography and Statistics, available at: http://seculoxx.ibge.gov.br/pt/populacionais-sociais-politicas-e-culturais/busca-por-palavra-chave/saude/985-malaria. Data for the years 1960–1964 were extracted from PAHO/WHO reports [199]. Data for 1987–1997 were extracted from Loiola [52]