Brazil’s Ministry of Health reports dozens of deaths resulting from a yellow fever outbreak in Minas Gerais, a large, inland state with low yellow fever vaccine coverage. Because Minas Gerais is adjacent to the states of Sao Paolo, Rio de Janeiro and other highly populated states with low vaccine coverage, the World Health Organization warns that a larger yellow fever epidemic is a possibility. Yellow fever is transmitted from the same mosquito that transmits the Zika virus, dengue fever, and chikungunya. Still recovering from the Zika virus outbreak that infected over 200,000 and resulted in almost 2,500 children born with congenital birth defects,