5月1日下午，由国药集团中国生物北京生物制品研究所研发的奥密克戎变异株新冠病毒灭活疫苗临床研究，正式在浙江省杭州市完成第一剂接种。这也是全球首支针对奥密克戎变异株进入临床试验的新冠病毒灭活疫苗。

China began clinical trials for a vaccine designed specifically against the Omicron variant in Hangzhou, Zhejiang province, on Sunday, making it the first vaccine of its kind to enter human trials in the world against the highly transmissible COVID-19 strain.

China National Biotech Group, a subsidiary of Sinopharm, has been developing the vaccine since December 2021, the company said in a news release on Monday.