coronavirus August 3, 2020 7:40 am There May Never Be a ‘Silver Bullet' for COVID-19 Despite multiple promising vaccine candidates, World Health Organization Director General Tedros Adhanom Ghebreyesus warns we may not ever have a “silver bullet” to stop the disease. 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