Volunteers test COVID-19 vaccine

Li Zhiji, a 36-year-old volunteer, receives the recombinant novel coronavirus (COVID-19) vaccine inoculation in Wuhan, Central China's Hubei province, on March 24, 2020. The first batch of 108 volunteers arrived in Wuhan on Tuesday to receive inoculations after a clinical trial of the novel coronavirus vaccine in China kicked off last Monday. All recipients will be under a 14-day quarantine after vaccination. [Photo by Zhu Xingxin/chinadaily.com.cn]