The Chinese mainland reported on Monday its first case of the highly transmissible Omicron COVID-19 variant in Tianjin as authorities in Zhejiang province stepped up measures to control outbreaks of the Delta strain.
The Chinese mainland reported on Monday its first case of the highly transmissible Omicron COVID-19 variant in Tianjin as authorities in Zhejiang province stepped up measures to control outbreaks of the Delta strain.