Zika's Potential Spread Within US Causes Growing Concerns

ABC News' Eva Pilgrim reports the latest health news about the dangerous virus.
2:21 | 09/10/16

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Transcript for Zika's Potential Spread Within US Causes Growing Concerns
We want to move to the new concerns about zika here in the U.S. Miami beach is spraying for mosquitoes this weekend as the number of pregnant women infected with the virus rises. And the CDC now saying that the money to fight zika is all but gone. ABC's Eva pilgrim joins us in studio with the latest. Eva, good morning. Good morning. Concerns and questions this morning about the safety of an insecticide now being used to fight zika in Miami beach. Initially those in charge said aerial spraying wouldn't be effective in Miami beach because of the wind and tall buildings. But now as more infected mosquitoes are found, the CDC and state recommending it. It's a full-on aerial assault, the battle to wipe out zika in Miami beach ramping up but it's what's being used to kill the mosquitoes that could be carrying the virus that this morning has residents upset. It could be extremely effective in killing not only the mosquitoes, the intended target but the whole ecosystem. Reporter: Residents taking to the streets with signs. We don't want no spray. Reporter: Protesting the newest weapon in the fight against zika in Miami beach. Aerial spraying. This as there are 56 non-travel related cases in Florida. 84 pregnant women have been infected with the zika virus and now the city finding a fourth mosquito pool testing positive for infected mosquitoes. We are concerned that it has more of a potential risk of creating the problems that we're trying to avert. Reporter: Now designed to attack mosquitoes in flight killing them on contact. While U.S. Health officials say it's safe naled has been banned in Europe since 2012. Health officials here in the U.S. Say naled is only toxic in high doses pointing out that an ultra low doughs being used in the aerial sprayings but that is not easing the minds of thousands of concerned residents who want to know more about what's being sprayed over them and their loved ones. I just want to know more about side effects of those chemicals. Reporter: The spraying comes as the head of the CDC warns that they are essentially out of money in the fight against the virus. This as congress looks to end the gridlock over a zika funding bill that may get another vote next week. For now the aerial sprayings continue. The next scheduled to happen early tomorrow morning. I can see why people are worried about that.

This transcript has been automatically generated and may not be 100% accurate.

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