The most important thing in sterilizing viruses and germs such as the Covid-19 virus should be harmless to the human body.
The chemical disinfectant to promote sterilization capabilities can cause a big problem to human body because the substances used are generally toxic.

This happened when the function of sterilization was added to the function of dust removal, which was the original purpose of the air purifier.
Filter inside the air purifier eventually became a hotbed of bacterial growth, and the three major domestic manufacturers added a very strong toxic substance called CMIT to the filter, which had a very large harmful effect on the human body.
CMIT has been mentioned in many press releases when chloromethyl is inhaled by the human body as a chemical preservative.It is a deadly toxic substance that leads to death.