I received a short message from Songjiang Prevention and Control Office, and I haven't been to Songjiang in recent 14 days.

It doesn't matter much. According to the big data survey, in the near future, COVID-19 may have the risk of direct or indirect contact with infected people. Doesn't mean you are close contacts. Take the initiative to do a good job in nucleic acid detection, and conduct a nucleic acid detection at the nucleic acid detection point as soon as possible, and conduct a nucleic acid detection every 24 hours, that is, two screenings should be completed within 3 days.