It's the first documented case of a person with no symptoms sexually transmitting the virus to a partner who had not traveled to an area of active Zika circulation. The announcement came the same day the Food and Drug Administration revised its guidance to recommend that all blood donations in the United States and its territories be tested for the Zika virus. The asymptomatic Zika transmission "illustrates the need for careful precautions when visiting an area where Zika is circulating," said Dr. John Brooks, a medical epidemiologist with the CDC. "Be sure to wear insect repellent and appropriate clothing, and use CDC guidance on safe sex when you return. "Pregnant couples need to defer unprotected sexual contact for the entire pregnancy, even if the exposed partner never develops symptoms of Zika.

Source: CNN August 26, 2016 17:03 UTC