Late Tuesday, the Centers for Disease Control and Prevention notified the Ohio Department of Health of the second case of Zika virus in a returning traveler from Haiti, a 21-year-old Stark County man.

Earlier Tuesday In Columbus, the Ohio Department of Health reported Ohio's first case of Zika virus in a returning traveler from Haiti, a 30-year-old Cuyahoga County woman, who lives in Cleveland.

Officials say the two cases are not linked.

“Given the number of travelers between Ohio and Zika virus-affected countries, it would not be a surprise to see more cases,” said ODH Medical Director Dr. Mary DiOrio.

ODH Medical Director Dr. Mary DiOrio added, "There is no vaccine available for Zika virus so it's important for Ohioans traveling to affected areas to take steps to prevent mosquito bites."

The CDC was reporting 35 cases of Zika virus in 12 states and the District of Columbia prior to Ohio's cases.

Zika virus is primarily transmitted through a mosquito bite, and there is no indication that it can spread from person to person through casual contact. CDC has confirmed a U.S. case of Zika virus infection in a non-traveler after the person's sexual partner returned from an affected country and developed symptoms.

Planning is underway for a Zika virus tabletop exercise to ensure Ohio's preparedness at the local and state levels prior to the 2016 mosquito season that runs from May to October.