Disinfection refers to the use of mild physicochemical factors to inhibit the means of pathogen reproduction. Disinfection of physical methods, chemical methods and biological methods, but biological methods using biological factors to remove pathogens, the role of slow, and sterilization is not complete, generally not used for infectious epidemic disinfection, so disinfection of the main application of physical and chemical methods. As for plastic products, synthetic fibers and fur products are not suitable. New cleaner, chlorhexidine chlorhexidine can not be sure, Dumifen, Lysol, carbolic acid, rice vinegar, fumigation vinegar on hepatitis B virus has no effect.