But the fact that the vaccines protected mice and that their antibodies protected other mice from Zika was grounds for optimism over the development of a Zika vaccine, he said. At least 15 companies and academic groups are racing to develop Zika vaccines, according to the WHO. The other was made from a purified but inactivated version of the Zika virus from Puerto Rico. "This is an encouraging first step in Zika vaccine design and pre-clinical testing. Both types of vaccines - DNA and inactivated virus vaccines - have been successfully developed to prevent infection from viruses related to Zika, including West Nile and dengue.

Source: Fox News June 28, 2016 15:22 UTC