No, in medicine called "sampling swabs", not called cotton swabs. This sampling "swab", belonging to a class of medical device products, not only the production to be filed, and has a strict production environment requirements and quality control standards, qualified products are certainly non-toxic and harmless.
This sampling "swab", belonging to the medical field of general products, can be sampled on different parts, but also applied in different testing behavior, is not particularly for nucleic acid detection or antigen detection production, so the swab will not contain other reagents.
Sampling swabs although it looks like cotton swabs
But it is made of polyester or nylon fibers, and daily life with a toothbrush is more similar to the sampling swabs in the process of doing so, is millions of tiny fibers vertically and evenly covered in the swabs handle end above. Sampling is like a toothbrush to brush your teeth, but it is brushing the posterior pharyngeal wall of the oral cavity to take cells, and then put the sampling swab into the sampling tube to go, because sampling swabs with nylon and polyester, so it will be very easy to get off to the preservation of the liquid inside the follow-up by the laboratory to carry out the relevant tests.
Li Jinming said, sampling swabs belong to the medical device, its production environment and requirements are very strict, quality control also has the relevant standards, a product of the most basic requirements is non-toxic and harmless, the production process will not produce harmful substances.