Read MoreThere are promising results on three different coronavirus vaccines, including the leading candidate from the U.K.’s Oxford University. Trials show it provides two kinds of protection against COVID-19. Charlie D’Agata has the latest.There are promising results on three different coronavirus vaccines, including the leading candidate from the U.K.’s Oxford University. Trials show it provides two kinds of protection against COVID-19. Charlie D’Agata has the latest.