Dr. Todd Ellerin, infectious disease specialist, discusses the COVID-19 variant found in the U.K. and answers questions about the coronavirus vaccines. abcAnswersCoronaviruscoronavirus immune systemCOVID-19COVID19discovereddiseaseimmune systemIMMUNITYlatestLIVEnewnewsp_cmsid=2494279p_vid=news-74880522questionsRolloutrolloutsukUpdateVaccineVariantvideoVITAMINvlogYouTube