CDC January 12, 2022 10:22 am CDC Director on When to Get a COVID Test Rochelle Walensky, Director of the Centers for Disease Control and Prevention, explains when people should get tested for COVID-19. 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