Did Tianjin’s Omicron coronavirus outbreak start elsewhere in China? Health officials investigate

  • Cases of the variant in the Chinese city found to have different sources to earlier imported cases, according to genome sequencing
  • City CDC deputy director says strain – which has a shorter incubation period than earlier ones – might have been ‘hiding’ in the city for some time

Residents line up to undergo a Covid-19 test in Tianjin Municipality, China, on Saturday. Tianjin has tested 9.6 million people in three days. Photo: EPA-EFE
Genome sequencing has shown that an ongoing Omicron coronavirus outbreak in Tianjin has a different source to earlier imported cases, according to a senior official at the northern Chinese city’s centre for disease control and prevention (CDC).

Zhang Ying, deputy director of the Tianjin CDC, told state broadcaster China Central Television (CCTV) on Monday night the Omicron strain circulating in the city might have come from another part of China or was transmitted through imported goods or other environmental contamination sources.

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