FLORIDA INVESTIGATES TWO MORE ZIKA CASES

Florida health officials are going door to door to investigate two more Zika infections that may have been spread by local mosquitoes, rather than travel. The new cases bring the total number of suspected local cases to four, all in Broward or MiamiDade county, according to the state health department.

Although Florida officials haven't yet confirmed how the infections were contracted, the spread of Zika among native mosquitoes would be a major change in the course of the disease in the continental U. S., whose Zika cases until now have been linked to travel.

According to the CDC, about 1,400 people in the continental U. S. have been diagnosed with Zika after traveling or, in 15 cases, having sex with a traveler. Zika is spreading much more widely in U. S. territories, with more than 3,700 cases just in Puerto Rico. Four hundred pregnant women in the continental U. S. have been diagnosed with Zika, along with 378 in the territories. — Liz Szabo