SAO PAULO (AP) — Health authorities in Brazil have closed 15 parks in the country's biggest city after a dead monkey infected with yellow fever was found in one of them.

Sao Paulo State Health Department chief David Uip told Jovem Pan radio station Thursday that closing the parks is a preventive measure.

All of the parks are located on the city's north side, where close to 13,000 people have been vaccinated for yellow fever since a vaccination campaign was launched last week.

Less than two months ago, Brazil declared an end to a yellow fever outbreak that infected 777 people and killed 250 during the first nine months of this year.