Why You Should Care About Zika

The U.S. declared the Zika virus outbreak in Puerto Rico a public health emergency on Friday, which U.S. Health and Human Services says means the virus is a "significant threat" to the territory. The declaration comes amid massive spread of Zika through Puerto Rico, infecting well over 6,000 people, including over 520 pregnant women.

In the continental U.S., local mosquitoes in Florida are still spreading the virus. So far there are 25 cases of Zika spread to people from mosquitoes in the area.