In an update to the yellow fever outbreak in Brazil, since the beginning of the outbreak in December 2016 to Feb. 18, 2017, there were 1,368 cases of yellow fever reported (326 confirmed, 125 discarded, and 916 suspected cases remain under investigation), including 220 deaths (109 confirmed, 6 discarded, and 105 under investigation), according to the Pan American Health Organization (PAHO).

Aedes albopictus/FotoshopTofs
Aedes albopictus/FotoshopTofs

The case fatality rate (CFR) is 33% among confirmed cases and 11% among suspected cases.

83% of the suspected and confirmed cases were reported in the state of Minas Gerais (1,209), followed by Espírito Santo (185), São Paulo (10), Bahia (9), Tocantins (2), Goías (1) and Rio Grande do Norte (1).

The confirmed cases are distributed in three states: Minas Gerais (269), Espírito Santo (53), and São Paulo (4).

In Minas Gerais, the downward trend in cases in the four administrative regions of the state continues to be observed.

With regard to the confirmed deaths, 92 occurred in the state of Minas Gerais, 3 in the state of São Paulo and 14 in the state of Espírito Santo.

The most important measure of prevention of yellow fever is vaccination which provides protective immunity against the disease to 80-100% of those vaccinated after 10 days and 99% immunity after 30 days.