If you have been to the prevention area for a long time, the health code will turn yellow. It is recommended to wear a mask and go to the nearest medical institution or hospital for two nucleic acid tests within 72 hours, and the time for two nucleic acid tests should be more than 24 hours. If both nucleic acid tests are negative, the health code will return to normal.
The standard for dividing the prevention area is to divide the closed control area and the street/town where the control area is located into prevention areas, and the specific scope is determined according to the expert group organized by the on-site headquarters and the risk of epidemic spread. The prevention area implements the management measures of "strengthening social control and strictly limiting personnel gathering". Don't leave the prevention area unless necessary. If it is really necessary to go in and out for medical treatment or specific official duties, a negative nucleic acid test certificate must be held within 48 hours.