"The World Health Organization advised pregnant women on Tuesday to avoid travel to areas where the Zika virus is spreading.

Experts on the organization’s Zika emergency committee also recommended that pregnant women and their partners who have been in areas with Zika rely on abstinence or safe sex to prevent sexual transmission of the virus.

Sexual transmission is “more common than previously assumed,” said Dr. Margaret Chan, the agency’s director general."

Donald G. McNeil Jr. reports for the New York Times March 8, 2016. [2]