coronavirus October 15, 2020 2:45 pm Doctors Push Back Against ‘Herd Immunity' as COVID-19 Cases Spike As COVID-19 cases increase in 36 states, medical experts are pushing back against the White House’s embrace of a “herd immunity” strategy. US & World Videos 2:33 CDPH releases updated Covid-19 isolation guidelines 1:31 CDC recommends updated Covid shot for everyone ages 6 months and up 2:17 San Diego and California's COVID-19 Emergency Declarations Are Expiring. Here's What That Means 2:30 San Diego and California COVID-19 Emergency Declarations Expire Tuesday 3:26 COVID, Flu Cases Down Slightly; Doctors Urge Caution