A rare case of the Zika virus being transmitted through sex, not a mosquito bite, has been reported in the US.
A patient infected in Dallas, Texas, is likely to have been infected by sexual contact, the Centers for Disease Control (CDC) told the Media.
The person had not traveled to infected areas but their partner had returned from Venezuela.
Zika is carried by mosquitoes and has been linked to thousands of babies being born with underdeveloped brains.
It is spreading through the Americas and the World Health Organization (WHO) has declared the disease linked to the virus a global public health emergency.
Meanwhile, Brazil - the country worst hit by the outbreak - has revealed it is investigating 3,670 suspected cases of microscopically in babies linked to the Zika virus.