One of the US's most senior public health officials has revealed the "strongest evidence to date" of the effect on babies of the Zika virus.
Dr Tom Frieden, head of the Center for Disease Control, said data from the cases of two infants in Brazil who died soon after birth indicated the virus had passed from mother to child.
But testifying before politicians in Washington, he said more tests must be done before the link can be proven definitively.
IN:"Right now..."
OUT: "...mosquito bites"
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