sterile step anti-corona
Calcium hypochlorite solution is a type of chemical with a formula of Ca(ClO)2 which is also called perchlorine in industries. Calcium hypochlorite is actually a strong oxidizing agent, and there are a number of safety precautions as manuals for applying with this kind of material. One way to prevent contamination entering to safe places is to use perchlorine solution to disinfect the soles of shoes.
(Please note that the coronavirus is a serious virus that is commonly heavy and would be found in the soles of shoes and floors).