- CDC tests 4,534 people for Zika virus from January to March
- 197 test positive for Zika virus
- Tests find 99% of pregnant women without symptoms were negative for Zika
(CNN)The U.S. Centers for Disease Control and Prevention screened 4,534 people for the Zika virus between January and March, according to a report published Friday. All of those screened either traveled to or moved from areas where the mosquito-borne disease is circulating. Just over 4% tested positive for the virus. More than 94% tested negative and another 1% had an unspecified virus in the same family as Zika, such as dengue or yellow fever, or may have been vaccinated against a related virus.