The sampling swab for nucleic acid testing is not actually a cotton swab, but is made of polyester or nylon fiber, similar to the bristles of a toothbrush. The swabs are medical devices, which are manufactured under strict conditions and requirements, and are subject to quality control standards. The sampling process may have a foreign body sensation, but it is harmless to the human body.
The material of the sampling swabs currently used on the market is mainly composed of nylon staple fiber fluffy head and medical grade ABS plastic rod, which is millions of tiny fibers vertically and uniformly covered in the swabs on top of the shank end, which is more similar to a toothbrush in daily life. "Because the nylon staple fibers are tightly fixed in a vertical manner at the front end of the sampling swab, they can collect and elute samples more efficiently than traditional cotton swabs, improving detection efficiency and accuracy."
The shank end of the sampling swab is covered with millions of tiny fibers. The sampling process, like a toothbrush brushing teeth, swabs brush the posterior pharyngeal wall of the mouth to take cells, followed by the sampling swabs into the sampling tube, the cells taken are easily dislodged into a preservation solution, which can be followed up by the laboratory to do the relevant tests.
The discomfort of the sampling process varies from person to person. Some people have a sensitive pharynx and feel uncomfortable after sampling, while others have a foreign body sensation or an itchy or vomiting feeling. Some people will have a greater tolerance, and there are greater individual differences. Once sampling is complete, the sensation is easily relieved. Sampling is not harmful to the individual.