coronavirus August 9, 2021 7:29 pm Dr. Peter Chin-Hong Answers Your COVID Questions We know a lot of viewers and parents have a lot of questions as kids go back to school. NBC Bay Area’s Janelle Wang spoke to UCSF’s Dr. Peter Chin-Hong for some answers. 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