coronavirus pandemic February 25, 2021 4:47 pm What Herd Immunity Is and How We Get It There’s a lot of talk these days about how herd immunity will be our ticket out of the pandemic. Here’s what you need to know about what herd immunity is and how we get it. 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
