What Does a 95% Effective Vaccine Really Mean? - YouTube
Malaria vaccine hailed as potential breakthrough
Early trials show Oxford developers may have finally found an effective jab against the disease.
More Contagious Virus Variant Is Now Dominant in U.S., C.D.C. Chief Says
The B.1.1.7 variant, first identified in Britain, is now the source of most new coronavirus infections in the United States, the director of the Centers for Disease Control and Prevention said.