Dr. Frieden said there could be as many as 10 undiagnosed cases for every one that is found, meaning there could be 50,000 infections within the continental U.S. because four out of five people infected with Zika don't show symptoms.
Zika largely spares U.S. as virus wreaks havoc worldwide →
"Funding will give us the means to better fight Zika and better protect babies," said Dr. Thomas Frieden, director of the Centers for Disease Control and Prevention.
HHS outlines plans for new Zika money →
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