Source: China – South China Morning PostThe northern Chinese port city of Tianjin launched citywide testing on Sunday after detecting 20 local Covid-19 infections in a single district, two of them caused by the highly transmissible Omicron variant.Genome sequencing showed the two Omicron cases were epidemiologically linked, city authorities said. One is a member of staff at an after-school care programme and the other is a primary school pupil. The rest of the cases were discovered when close contacts of the first two patients were…Read More