The US government has shifted $US34 million ($A44.14 million) in funding to the National Institutes of Health and $US47 million to the Biomedical Advanced Research and Development Authority to work on Zika vaccines.
The announcement was made in a letter from Health and Human Services Secretary Sylvia Burwell addressed to Nancy Pelosi, a Democrat and minority leader of the US House of Representatives.
Burwell said the funding was intended to keep Zika vaccine research going despite the lack of funding from US lawmakers, who left for summer recess before allocating any funding to Zika research and preparedness.

