84 disinfectant can be configured in a 1:500 ratio with water or in a 1:200 ratio. It is clinically effective in preventing the transmission of the new coronavirus through 84 disinfectant, which is a highly effective disinfectant containing chlorine that is highly irritating and widely used in hotels, hospitals, food processing industries, etc. The disinfection methods are wiping, spraying, mopping, etc. After disinfection, it is best to open the windows and ventilate, because the disinfectant is a highly effective disinfectant based on sodium hypochlorite, which will volatilize chlorine gas when exposed to the air. Chlorine gas is toxic and invades the body mainly through the respiratory tract, which can easily lead to severe coughing, difficulty in breathing and other related reactions in patients, which should be noted clinically.