There are two types of disinfection, i.e., epidemic source disinfection and preventive disinfection. Disinfection at the source of the epidemic is the presence of infectious patients, the source of infection, the scope of possible contamination of the source of infection disinfection treatment. If there is no clear source of infection is also disinfected, that is, preventive disinfection. Preventive disinfection generally uses a disinfectant concentration that is usually low, but to ensure that it is effective against the target microorganisms, such as chlorinated disinfectants to carry out preventive disinfection, usually do not exceed 1000mg/L, the concentration should not be too high. For disinfection of surfaces, 250-500 mg/L is usually sufficient. If there are obvious contaminants such as feces or blood stains when doing preventive disinfection, remove them before wiping or soaking with 250-500mg/L of chlorinated disinfectant. Content source: Dr. You Lai