When doing nucleic acid for the first time, it was detected that the cotton swab had a strong vomiting feeling when inserted into the throat, accompanied by dizziness for a short time. This is residual ethylene oxide, which is used to disinfect cotton swabs. 90% masks in China are also disinfected with ethylene oxide. Most of them contain fluorescent agent and graphene oxide.
Long-term exposure to a small amount shows neurasthenia syndrome and autonomic nervous dysfunction. Therefore, everyone has done nucleic acid testing many times, which is easy to neurasthenia and neurological dysfunction. I suggest you do a sputum test.
relevant knowledge
The cotton swab used for sampling should be called "sampling cotton swab" instead of "cotton swab" because it is not used in daily life.
The biggest difference between them is that cotton swabs in daily life are absorbent cotton, while sampling cotton swabs look similar to ordinary cotton swabs, but they are actually flocking cotton swabs.
Flocking swab is used because it is more suitable for sampling and testing. Flocking cotton swabs adopt nylon fiber flocking technology, and the front end is coated with vertically fixed nylon short fibers, so that there is no absorption hole in the whole collection area of collecting cotton swabs.
The samples collected in this way will not be dispersed in the fiber, which is beneficial to faster and more efficient elution. Relevant data show that flocking cotton swabs can elute more than 85% of the sample set; Traditional cotton swabs, especially those made of absorbent cotton, cannot completely collect and elute samples.