Brazil is investigating thousands of cases of babies born with abnormally small heads thought to be linked with Zika, a mosquito-borne virus circulating in Latin America and the Caribbean.
In this small case series, Zika virus infection during pregnancy was associated with a range of outcomes, including early pregnancy losses, congenital microcephaly, and apparently healthy infants, the CDC said.
Microcephaly is a birth defect associated with undersized heads and developmental problems.
After reports that the USOC advised athletes to consider not attending the Olympics if they fear the virus, the committee vehemently denied this claim last month.
The USOC noted that it is monitoring the situation through the CDC and have ongoing contact with the International Olympic Committee. In addition, Joao Grangeiro, the organizers’ medical director, noted that the mosquito count should fall in August during Brazil’s winter.
“Athletes are not at risk,” added Grangeiro. “We will have Summer Games, but for us it’s winter time.”