Do you need to do nucleic acid testing when traveling?

Policies are different all over the country, but nucleic acid testing is still needed for safety reasons. Although I know that many friends are in low-risk areas and do not need nucleic acid proof, the epidemic situation is changing and the policy will be adjusted. If the policy changes, tourists should try to prepare the nucleic acid test form in advance before departure.

At the same time, tourists should pay attention to the epidemic prevention and control policies and related information publicly pushed by tourist attractions in tourist cities, and adjust their expectations for the journey in coordination with the epidemic prevention policies of tourist destinations when traveling abroad. Because the epidemic situation is always changing, there are not necessarily cases anywhere in the country. If you stay in the tourist destination for too long, you still need to do another nucleic acid test after you come back if conditions permit.

Extended data

The reason why nucleic acid detection is effective for 7 days

Not long ago, Wu Zunyou, chief epidemiologist of China Center for Disease Control and Prevention, answered the question of the validity period of nucleic acid testing at the press conference on epidemic prevention and control in novel coronavirus.

Wu Zunyou said that the shorter the ideal validity period of negative results of nucleic acid testing, the safer it is. But if it is too short, it needs frequent detection, which is difficult to operate in reality. The validity period is limited to 7 days, which is mainly determined according to the COVID-19 incubation period method. The incubation period in COVID-19 is usually 3 to 7 days, some people are less than 3 days, some people are more than 7 days, and the longest incubation period is 14 days. Therefore, 14 days is set as the observation period for close contacts. On the other hand, consider the feasibility of actual operation. This is scientifically feasible.

If all aspects of nucleic acid detection can be accurate, the accuracy of nucleic acid detection can reach more than 95% in an ideal state. However, due to various reasons, there will be false negative results. The so-called false negative means that the subject is really infected, but the nucleic acid test result is negative, which belongs to false negative. With the improvement of technical level, the accuracy of medical institutions is increasing rapidly, and the false negative rate is decreasing.

People's Network-How high is the accuracy of nucleic acid detection? Why is the negative result valid within 7 days?