The World Health Organization said Friday that widespread vaccination for COVID-19 is not likely until the middle of next year.Subscribe to WCVB on YouTube now for more:Get more Boston news: Like us: Follow us: Instagram: CoronavirusCOVID-19COVID19doctorimmune systemIMMUNITYPotentialTuftsVaccinevideoVITAMINvitamin COVID-19vlogWinterYouTube
