Add Yahoo as a preferred source to see more of our stories on Google. Experts are warning that yellow fever — which hasn’t had a major outbreak in the U.S. since 1905 — could make a comeback. (Photo ...

A next-generation, live-attenuated yellow fever vaccine, vYF, was developed in Vero cells to improve vaccine supply and availability. The safety of and immune response to vYF as compared with those of ...