https://apnews.com/b89077d3a652cc564a5b01083de8dbce

WASHINGTON (AP) — Three potential COVID-19 vaccines are making fast progress in early-stage testing in volunteers in China and the U.S., but it’s still a long road to prove if they'll really work.

China’s CanSino Biologics is beginning the second phase of testing its vaccine candidate, China's Ministry of Science and Technology said Tuesday.