According to CCTV news, the State Council joint prevention and control mechanism held a press conference at 3 p.m. on July 8. The State Council joint prevention and control mechanism integrated group conducted a pilot study on the optimization of prevention and control measures for the new crown pneumonia epidemic in some port cities across the country, and found that the average incubation period of the Omicron variant strain was shortened to 2-4 days, and the vast majority of them could be detected within 7 days.

Based on the results of the pilot study and the practice of epidemic prevention and control in many places in China, the ninth edition of the prevention and control program has optimized the isolation and control time for incoming personnel. The duration of isolation and control of inbound personnel was adjusted from "14 days of intensive isolation medical observation + 7 days of home health monitoring" to "7 days of intensive isolation medical observation + 3 days of home health monitoring". The optimal adjustment of the control measures for inbound personnel is based on sufficient scientific basis, and is also based on prevention and control practices.

The incubation period of Omicron virus is shortened and the infectiousness is enhanced, the prevention and control of the epidemic is severe, it is especially important to do a good job of personal protection, less personnel wear disposable medical masks, and more people wear KN95 masks to increase protection and reduce the number of out-of-home measures.