2. People who have lived in high-risk areas for 7 days were isolated for medical observation for 7 days, and the nucleic acid (oropharynx) was detected on 1, 2, 3, 5 and 7 days.
3. For those who have lived in the middle-risk area for 7 days, take 7-day home isolation medical observation, and detect the nucleic acid (oropharynx) of 1, 4 and 7-day home isolation medical observers. Those who do not have the conditions for home isolation medical observation shall adopt centralized isolation medical observation, and the management period shall start from leaving the risk area.
4. For those who have lived in low-risk areas for 7 days, they should complete two nucleic acid tests within 3 days and do a good job in health monitoring.