What You Need to Know About The Yellow Fever Epidemic in Brazil Forbes.com March 22, 2018
A yellow fever outbreak that began a year and a half ago in
Brazil is spreading further, with additional cases since last
July in the Brazilian states of Sáo Paulo, Minas Gerais and Rio
de Janeiro, plus several cities in Bahia State.
The World Health Organization began recommending yellow fever
vaccination for all travelers and residents of these areas in
January, but since then, 10 travelers have contracted the
disease—all unvaccinated—and four died.