What are COVID-19 time and space companions? Is centralized isolation required? Is there a high risk of infection?

The definition is as follows:

The time and space companion is the person who stayed in the same time and space grid (range is 800M*800M) for more than 10 minutes with the confirmed number, and has stayed in the same time and space in the last 14 days If either party's number stays for more than 30 hours in total, the number detected is a time-space accompanying number.

Close contacts refer to people who have had close contact with suspected and confirmed cases of the virus starting 2 days before the symptoms appeared, or 2 days before the specimens of asymptomatic infected persons were collected but did not take effective protection. personnel.

Centralized isolation is required and the risk of infection is not high.

On August 28, 2021, Air China Zhejiang Branch reported through the epidemic reporting mechanism that a passenger who took the company's flight to Singapore was tested positive for the new coronavirus nucleic acid there. The Hangzhou Municipal Disease Control Department quickly Carry out epidemiological investigations.

The passenger flew from Guangzhou to Hangzhou at 21:00 on August 26, stayed overnight at Hangzhou Xiaoshan International Airport, and transferred to Singapore in the morning of August 27. Up to now, the disease control and other relevant departments have identified the passenger’s close contacts, sub-close contacts, and time and space companions. Corresponding control measures have been implemented for those in Hangzhou, and have been sent to various places for joint investigation for those leaving Hangzhou. All nucleic acid test results of the control personnel have been included. All were negative.