How Long Should You Leave a Face Mask On？

1. The general public

◎ Good ventilation at home and outdoors without people gathering. Masks are not recommended.

◎ In crowded places, such as office, shopping, restaurant, conference room, and workshop, etc. Or take the van elevator, public transportation, etc. In medium-risk and low-risk areas, it is recommended to keep a standby mask (disposable medical mask or surgical mask) at all times and wear a mask when in close contact with other people (less than or equal to 1 meter). In high-risk areas, single-use medical masks are recommended.

◎ For coughing or sneezing and other cold symptoms. Disposable surgical masks or surgical masks are recommended.

◎ For those who live together with those who are quarantined at home or discharged from hospital. Disposable surgical masks or surgical masks are recommended.

2. Personnel in specific places

◎ Located in crowded hospitals, bus stations, train stations, subway stations, airports, supermarkets, restaurants, public transportation, community and workplace entrances and exits, etc. In medium - and low-risk areas, staff are advised to wear disposable medical masks or surgical masks. In high-risk areas, staff are advised to wear medical surgical masks or protective masks rated KN95/N95 and above.

◎ In prisons, nursing homes, welfare homes, mental health care institutions, as well as school classrooms, dormitories on construction sites and other crowded places. In medium - and low-risk areas, it is recommended to carry a standby mask (disposable medical mask or surgical mask) and wear a mask when people gather or have close contact with others (less than or equal to 1 meter). In high-risk areas, staff are advised to wear medical surgical masks or protective masks rated KN95/N95 and above; Other personnel wear disposable medical masks.

3. Key personnel

Suspected and confirmed SARS-COV-2 cases and asymptomatic infected persons; Close contacts of SARS-COV-2; Entry persons (from the beginning of entry to the end of quarantine). Surgical masks or respirators with non-exhalation valves of KN95/N95 or above are recommended.

4. Occupational exposure personnel

◎ Medical staff in general outpatient and ward; Emergency medical personnel in low-risk regional medical institutions; Administrative personnel, police, security guards and cleaning personnel engaged in epidemic prevention and control. Surgical masks are recommended.

◎ Staff working in wards and ICU of confirmed and suspected SARS-COV-2 cases; Medical staff of fever clinics in designated medical institutions; Medical personnel in emergency departments of medical institutions in medium and high risk areas; Personnel for epidemiological investigation, laboratory testing and environmental disinfection; Transport confirmed and suspected cases. Medical protective masks are recommended.

◎ Operators engaged in respiratory specimen collection; Staff who perform tracheotomy, endotracheal intubation, tracheoscopy, sputum aspiration, cardiopulmonary resuscitation, lung transplantation, and pathological dissection of PATIENTS with SARS-COV-2. Suggestions: Hood type (or full type) power air filter respirator, or half face type power air filter respirator with goggles or full screen; P100 anti-particulate filter element should be used for both respirators. The filter element should not be reused, and the respirator should be used after disinfection.

5. Precautions for mask use

◎ Respirators include masks and masks. Wash hands before wearing and after removing them.

◎ When wearing a mask, pay attention to the front and back of the mask, cover the mouth and nose, adjust the nose clip to fit the face.

◎ Avoid touching the inside and outside of the mask with hands during wearing. Remove the mask by removing both ends of the rope.

◎ Wearing multiple masks can not effectively increase the protective effect, but increase respiratory resistance, and may destroy the tightness.

◎ There is no evidence to prove the effectiveness of all kinds of cleaning and disinfection measures for masks.

◎ Disposable medical masks and surgical masks are limited in use for a maximum of 8 hours. Masks should not be used for more than 4 hours by occupationally exposed persons and should not be reused.

Source:

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