As the Zika virus continues to spread, US health officials said they are working on a way to fight it.
The Zika virus is transmitted by mosquitoes and is tied to birth abnormalities in newborns.
A widespread vaccine against the virus is likely a few years away, but health officials say a vaccine development is underway.
"We have already started to develop the vaccine in the early stages, and we can predict that we likely would be in phase-one trial just to determine if it's safe," said Dr. Anthony Fauci, the director of National Institute of Allergy and Infectious Diseases. "If it induces a good response, probably by the end of the summer, we'd get that going by the end of this year. And if it looks like it's safe, we'll go to the next stage."
The virus has spread to at least 29 countries so far.
President Barack Obama is asking Congress for $1.8 billion to help fight the disease.
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