CNN New Day With John Berman and Brianna Keilar August 19, 2021 11:38:00
Focus, the administration is now advising covid vaccine booster shots for all americans who are 12 and older and this will be eight months after they get their second shot. health officials cited three separate studies that show the vaccine's protection drops over time. so joining me now for more on this is u.s. surgeon general dr. vivek murthy. thank you so much for being with us on this, sir. okay. first things first before i ask about this booster, how much drop in protection are we talking about over time? >> well, good morning. good to be with you as well. a few things i would say. number...