The Zika virus raising concerns about a Major League Baseball series in Puerto Rico next month.

FOX's Kathleen Maloney reports:

The Miami Marlins and the Pittsburgh Pirates scheduled to play a two game series on the island which has 550 confirmed cases of the Zika virus. That has players worried about their health and the health of their families.

MLB Commissioner Rob Manfred assuring players their safety is paramount but:

(Manfred) "We feel it's an important priority for baseball and we're very anxious to play those games."

The CDC has confirmed that Zika causes a serious birth defect of the brain. Its mostly caused by mosquito bites, but can also be spread through sex with an infected partner.

Kathleen Maloney, FOX News.