上海加强疫情防控措施 - 2021年02月01日

The city's two new locally transmitted COVID-19 infections reported on Friday, both close contacts of confirmed cases, were discovered through effective control measures, said officials during a conference on Saturday.
“We conduct nucleic acid sampling, screening and quarantine of close contacts within 24 hours if there’s infection, no matter if it’s daytime or at night,” said Wu Huanyu, deputy director of Shanghai Center for Disease Control and Prevention (CDC).
There are three areas in Huangpu District currently under lockdown due to COVID-19 infection.