January 14, 2022 3:32 pm CDC Updates Mask Guidance, Says N95s Are Best The Centers for Disease Control and Prevention updated its mask guidance, saying that N95 masks offer the highest protection. 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
