Divers Face Mosquitoes And Ambivalence at Rio Diving Event

Abby Johnston is not only an Olympic diving silver medalist, she's also a second-year medical student who's been studying Zika from afar. (Read More in Other Sports)

The American is in Rio de Janeiro for an Olympic qualifying event, and she's ambivalent about being at the epicenter of the mosquito-borne virus that is suspected in an increase in a rare birth defect in Brazil.

On one hand she says "it's a little unnerving not knowing the long-term ramifications." On the other, she says she's "using a lot of bug spray and just hoping for the best."

Johnston is among 217 divers from 46 countries who opened the event Friday. They compete in an open-air venue that borders a polluted lagoon, and Rio Olympic organizers say they are doing all they can to control the mosquitoes.