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What virus is this wave of epidemic in Shijiazhuang?

The epidemic in Shijiazhuang is Omicron strain. According to relevant public information, the BA.5.2 series branch of COVID-19 strain of Shijiazhuang epidemic showed strong transmission ability and short incubation period. Specifically, the real-time transmission index Rt is as high as 8.2, and the average time from infection to infection is only 2 days, and the shortest is only 24 hours.