its third shot will be a half dose. the data are not perfect but these are extraordinary times. the president making the sell for boosters. these boosters are free, available and convenient to get. reporter: as johnson & johnson case for a booster comes up millions vaks natsed with moderna. the extra dose of protection may be a shot away. miguel almaguer is reporting for us there. dr. emanuel, it s great to see you. let s talk about this booster shot. as you hear this news about moderna with pfizer booster being approved of emergency use authorization and the white