Table 3. COVID-19 related disinfection methods for employee reference.

Objects of disinfection	Green & blue areas	Red &yellow areas	Disinfection instructions
Ambient air	Air disinfector	Peracetic acid, hydrogen peroxide	Spray method
Patient excrement, vomit and secretion	Disinfectant containing chlorine (400–700 mg/L)	Disinfectant containing chlorine (5,000–10,000 mg/L)	Small amounts of pollutants can be removed by using disposable absorbent materials. Large amounts of pollutants should be completely covered with disinfectant or bleaching powder containing absorbent ingredients, followed by careful removal. Pollutants in the red & yellow areas should be collected in special containers, and disposed of after using a disinfectant containing 20,000 mg/L chlorine, at a fecal to disinfectant ratio of 1:2 for 2 hours
Floors, walls, elevators	Disinfectant containing chlorine (400–700 mg/L)	Disinfectant containing chlorine (1,000 mg/L) or chlorine dioxide (500 mg/L)	Wipe and spray from the outside to the inside and then from the inside to the outside for ≥30 minutes
Surfaces of objects	Disinfectant containing chlorine (400–700 mg/L) or quaternary ammonium disinfectant (1,000–2,000 mg/L)	Disinfectant containing chlorine (1,000 mg/L) or chlorine dioxide (500 mg/L)	Wipe, spray, or soak for disinfection
Corpses	Rinse skin with water	Disinfectant containing chlorine (3,000–5,000 mg/L) or 0.5% peracetic acid	Fill the open lumen of a corpse with cotton balls or gauze containing chlorine-based disinfectant
Bedclothes and other fabrics	Disinfectant containing chlorine (250–500 mg/L) or chlorine dioxide (100–250 mg/L)	Disinfectant containing chlorine (500 mg/L)	Burn the textiles associated with suspected/confirmed cases per centralized incineration of medical waste. If reuse is necessary, soak and disinfect them with 500 mg/L disinfectant containing chlorine before handling them as usual

COVID-19, coronavirus disease 2019.