Maybe everyone will wonder, why do you want to do multiple rounds of nucleic acid?
1, the continuous variation of the virus presents new characteristics.
BF.7 is the abbreviation of BA.5.2.1.7, a subfamily of omega clone ba.5 mutant. Compared with BA.4 or BA.5, BF.7 has the advantages of fast spread, strong infectivity and short intergenerational interval, which easily leads to large-scale spread. Recently, WHO also issued a warning: BF.7 is spreading around the world, "or it will become mainstream in a few weeks".
2. Nucleic acid detection is still an important means for early detection of infected people.
The intergenerational interval of BF.7 infection cases is shortened, so it is necessary to detect nucleic acids dynamically and repeatedly in a short time in order to find them as soon as possible. Only by quickly and accurately finding potential infected people, especially asymptomatic infected people, and effectively cutting off the virus transmission chain in time, can the maximum prevention and control effect be achieved at the lowest cost.
3. The nucleic acid test result is "false negative"
Factors such as disease development stage, sampling and vaccination will affect virus detection:
The concentration of virus in the body is not enough, which is lower than the detection limit, and false negative may occur;
If the virus is not collected at the time of sampling, false negative may appear;
The antibody produced by vaccination removes the virus, and the virus load is small, which may lead to false negative;
Other physical and chemical factors affecting the stability of COVID-19 nucleic acid.
Based on the above reasons, only by adjusting the frequency of nucleic acid detection and conducting multiple rounds of nucleic acid detection in key areas and key personnel can we quickly and accurately find potential infected people and take targeted control measures in time to stop the spread of the epidemic.
It should be noted that the increase in the frequency of nucleic acid detection and the queuing of people also increase the potential risk of infection. Members of the public should pay attention to the following points when participating in nucleic acid testing:
Before sampling: don't eat half an hour before sampling, try to choose a sampling point with few people, wear a mask regularly throughout the whole process, bring a mobile phone, consciously and orderly queue up and keep a line. You can carry an appropriate amount of disinfectant wipes and spare masks.
When sampling: Do not put your belongings on the sampling table, and do not touch the sampling table and the protective clothing of the sampling personnel. Try to relax, reduce swallowing and clear your throat.
After sampling: put on a mask and leave immediately. Don't stay at the sampling point. Do a good job of hand hygiene in time. If you need to replace the spare mask, please throw the discarded mask into the designated medical trash can.