China has updated its COVID-19 control protocol in which the health monitoring time of close contacts and inbound travelers has been cut from 21 days to 10 days.
An official explained that the adjustment was made in a targeted manner based on scientific research.
"It was found that the incubation period of Omicron virus was shorter, with an average of 2 to 4 days. Most can be detected within 7 days.
“研究发现，奥密克戎病毒的潜伏期有所缩短，平均为2-4天 。绝大部分都能在7天内检出 。
It is one of the reasons to optimize the time limit for health condition monitoring."
Another official added that a pilot study was carried out before launching the latest protocol.
"We carried out a month-long pilot study on optimizing COVID prevention and control measures in April and May in seven cities, including Dalian, Suzhou, Ningbo, Xiamen, Qingdao, Guangzhou, and Chengdu.
We obtained a large amount of scientific evidence from that."
The official stressed that the adjustment does not mean loosening measures, but optimizing the measures in a targeted and more efficient manner.
He said China unswervingly sticks to its dynamic zero-COVID policy.
The officials say that the joint prevention and control mechanism has held video conferences and will launch online training
to make sure that the 9th edition of diagnostic and treatment protocols for COVID-19 are fully implemented.