Thirty-three members of the U.S. military have contracted the Zika virus overseas, including one pregnant woman.
Pentagon officials say all of those infected were stationed in countries where the virus has been identified.
In addition, six family members of military personnel have also been infected.
Pentagon spokesman Major Ben Sakrisson said he did not say how many service members remain ill or how many had returned to the United States.
More than 1,650 people in the mainland U.S. have contracted the virus in recent months, nearly all while traveling in other countries.