coronavirus December 9, 2021 5:43 pm FAQ: COVID-19 Booster Shots for Teens NBC Bay Area’s Raj Mathai spoke to Dr. Peter Chin-Hong, infectious disease specialist from UCSF, about Pfizer’s booster shots for teens. US & World Videos 2:19 San Francisco barbershop struggles to stay open after pandemic 0:51 Alameda County using dogs to detect COVID 3:57 Interview: Doctor's perspective on COVID 4 years after shutdown started 2:27 Marking 4 years since COVID-19 shut down the Bay Area 2:09 CDC updates COVID isolation guidelines