People line up to receive the yellow fever vaccine at a public health post in Caratinga, in the southeastern state of Minas Gerais, Brazil, on January 13, 2017. Health authorities of Minas Gerais decreed a health emergency in 152 cities and towns due to a likely outbreak of yellow fever. There have been 110 suspected cases of yellow fever in the state, with 30 probable deaths, so far this year. / AFP PHOTO / DOUGLAS MAGNO (Photo credit should read DOUGLAS MAGNO/AFP/Getty Images)
