Dr. Ashish Jha, Dean of the Brown University School of Public Health, speaks on extending the time between the second dose of coronavirus vaccine and when the country may see widespread immunity. Subscribe to GMA's YouTube page: https://bit.ly/2Zq0dU5 Visit GMA's homepage: https://www.goodmorningamerica.com Follow GMA: TikTok: tiktok.com/@gma Facebook:facebook.com/GoodMorningAmerica Twitter: twitter.com/gma Instagram: instagram.com/goodmorningamerica Watch full episodes: abc.go.com/shows/good-morning-america hulu.tv/2YnifTH #GMA #COVID19 #Coronavirus #Vaccine #Pandemic