CDC Advisers Recommend Pfizer-BioNTech's Booster Shot | Nightly Check-In

The Centers for Disease Control and Prevention signed off on the third dose of the Pfizer-BioNTech COVID-19 vaccine for certain at-risk Americans. Why San Diegans say it’s important, plus, a local charter school is the first public school in the county to mandate vaccines for eligible students. A look at when those mandates go into effect. NBC 7’s Monica Dean has your Nightly Check-In for Thursday, Sept. 23, 2021.