Judy Woodruff:

The Zika outbreak in 2016 hit Puerto Rico hard, infecting 40,000 people.

But following the devastation wrought by Hurricane Maria one year ago, the island's health officials claim that there have been no new cases of the mosquito-borne virus.

In this story by the GroundTruth Project, in collaboration with Reveal from the Center for Investigative Reporting, Beth Murphy explores whether the hurricane really swept away Zika, and, if not, what's being done for moms and babies at risk?

It's part of this week's Leading Edge series, which focuses on science and medicine every Wednesday.