The content originally appeared on: CNN (CNN)Millions of Shanghai residents braved sweltering heat Tuesday to wait in line for compulsory Covid tests, as growing case numbers and the emergence of a highly infectious Omicron subvariant spurred new fears of a return to mass lockdown. Shanghai authorities have ordered the majority of the city's 16 districts to undergo two rounds of testing from Tuesday to Thursday, after a case of the new BA.5.2.1 subvariant was detected in the community on July […]
