Associated Press: WHO: All of Sao Paulo state at risk for yellow fever
“The World Health Organization announced Tuesday that it now considers all of Sao Paulo state at risk for yellow fever, recommending that all international visitors to the state be vaccinated. That puts the megacity of Sao Paulo on the list…” (DiLorenzo, 1/16).

Reuters: WHO recommends yellow fever shot to Sao Paulo visitors
“…But Brazil’s Health Ministry said the WHO recommendation, coming just weeks before Carnival when tens of thousands of tourists descend on Brazil, would not cause it to change its advisory that only travelers going to rural areas need to get vaccinated. Deputy Health Minister Antonio Carlos Nardi said Carnival celebrations in February were in urban areas and that visitors would not be at risk if they stayed in cities…” (Boadle, 1/16).