December 14, 2021 8:15 PM
Omicron hits China after more transmissible Delta strain sub-lineage AY.4, Chief Epidemiologist calls for cooperation with other countries on mRNA vaccines
China reported two COVID-19 cases of highly transmissible Omicron variant this week after a sub-strain of the Delta variant triggered a new cluster of cases in eastern China's industrial powerhouse province of Zhejiang, causing lockdown, travel restrictions, and shutting down factories. State m...