Table 1.

Four-level risk classification of hospital departments and relevant preventive measures for both medical personnel and patients.

Risk Rank	Departments and Areas	Preventive Measures
Low risk of exposure	General outpatient clinic, general ward, observation ward, medical technology department, administrative/financial work office, dining room, toilet room, etc.	1. Work clothes 2. Medical surgical masks
Medium risk of exposure	Respiratory outpatient clinics, hemodialysis centers, disinfection supply centers, injection centers, puncture centers, interventional treatment centers, etc.	1. Work clothes 2. Medical surgical masks
High risk of exposure	Emergency department, stomatology outpatient, otolaryngology outpatient and laryngoscopy room, digestive endoscopy center, respiratory endoscopy center, etc.	1. Work clothes 2. Medical protective masks 3. Isolation clothes 4. Safety goggles (if necessary)
Extra-high risk of exposure	Fever outpatient clinic; PCR laboratory; some operations that may produce the aerosol such as endotracheal intubation, bronchoscopy, sputum suction, pharyngeal swab sampling, etc.	1. Work clothes 2. Disposable operating caps 3. Medical protective masks 4. Isolation clothes 5. Safety goggles 6. Disposable latex gloves