Why are nasal swabs everywhere in the airport?

With the recurrence of the epidemic, I believe many people have done nucleic acids many times. Friends who have done nasal swab and throat swab will find that nasal swab test will be more uncomfortable than throat swab test. Then why do you need a nasal swab when you have a throat swab?

In fact, there is a set of scientific judgment basis for medical staff to collect oropharyngeal swabs or nasopharyngeal swabs at the anti-epidemic and epidemic prevention work site.

For nucleic acid detection and screening in the community, it is more convenient and faster to use oropharyngeal swab because it pays more attention to rapid screening. However, the collector can see the sampled part, which may lead to nausea, vomiting and other reactions. Moreover, due to the influence of factors such as diet, drinking water and swallowing, the detection rate of oropharyngeal swab will be affected to some extent.

In the process of nose swab sampling, the sampled person only needs to show his nose, and the probability of being exposed to virus environment is low. For high-risk groups, such as asymptomatic infected people, immigrants or suspected people who are being isolated, taking nasal swab for nucleic acid detection can reduce the infection risk of collectors and at the same time have higher psychological acceptance for collectors, that is, medical staff.