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Situation summary in the Americas
Since epidemiological week (EW) 1 to EW 6 of 2017, Brazil, Colombia, Peru, and the Plurinational State of Bolivia, have reported suspected and confirmed yellow fever cases.
The following is a situation summary in Brazil.
In Brazil, since the beginning of the outbreak in December 2016 to EW 6 of 2017, there were 1,336 cases of yellow fever reported (292 confirmed, 124 discarded, and 920 suspected cases remain under investigation), including 215 deaths (101 confirmed, 5 discarded, and 109 under investigation). The case fatality rate (CFR) is 35% among confirmed cases and 12% among suspected cases.
According to the probable site of infection, the suspected and confirmed cases are distributed in six states: Bahia (9), Espírito Santo (177), Minas Gerais (1,008), Rio Grande do Norte (1), São Paulo (10), and Tocantins (2).1 While the confirmed cases are distributed in three states: Espírito Santo (42), Minas Gerais (246), and São Paulo (4).
In Minas Gerais, where 84% of the total suspected and confirmed cases were reported, there is a downward trend in cases in the four administrative region of the state after a peak in EW 3 of 2017 with approximately 360 cases reported in that week alone in all regions. Nonetheless, the decreasing trend will continue to be monitored to see if it continues in all the regions in the coming weeks (Figure 1).