coronavirus April 15, 2020 1:48 pm China Begins Second Phase of Coronavirus Vaccine Trial China’s Academy of Military Medical Sciences began the second phase of a clinical trial on Sunday for a coronavirus vaccine. US & World Videos 1:43 How to tell if it's COVID, flu or fall allergies and what to do 1:59 New COVID-19 vaccines, free tests available as cases rise 1:31 CDC recommends updated Covid shot for everyone ages 6 months and up 1:33 People weigh updated COVID-19 boosters as FDA potential approval nears 2:26 COVID-19 Public Health Emergency Ends in Connecticut