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MIAMI, FL - AUGUST 12:  A plane sprays pesticide over parts of the city of Miami in the hope of controlling and reducing the number of mosquitos, some of which may be capable of spreading the Zika virus on August 12, 2016 in Miami, Florida. The CDC has advised pregnant women to avoid the Wynwood neighborhood of Miami where the majority of the 25 cases of people with the Zika virus have been found.  (Photo by Joe Raedle/Getty Images)
MIAMI, FL - AUGUST 12:  A plane sprays pesticide over parts of the city of Miami in the hope of controlling and reducing the number of mosquitos, some of which may be capable of spreading the Zika virus on August 12, 2016 in Miami, Florida. The CDC has advised pregnant women to avoid the Wynwood neighborhood of Miami where the majority of the 25 cases of people with the Zika virus have been found.  (Photo by Joe Raedle/Getty Images)

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Zika outbreak: Why some are saying no to Zika spraying

As congress remains gridlocked on the Zika funding bill, there are new fears among Floridians that a chemical substance in Zika pesticide may be harmful. CNN's Manu Raju, Boris Sanchez, and Dr. Sanjay Gupta report.

Zika outbreak: Why some are saying no to Zika spraying

As congress remains gridlocked on the Zika funding bill, there are new fears among Floridians that a chemical substance in Zika pesticide may be harmful. CNN's Manu Raju, Boris Sanchez, and Dr. Sanjay Gupta report.