Can disposable masks be reused?

Disposable masks are原则上 not recommended for reuse. Disposable masks are intended for single use only, and their protective effectiveness decreases after use. They may also become a source of contamination due to adsorption of viruses and bacteria. When mask supplies are limited, reuse may be considered if the environment in which the mask was worn was clean, there was no contact with potentially high-risk individuals, and the mask itself remains uncontaminated and undamaged. Before reuse, the mask should undergo sufficient heating and disinfection treatments, such as ultraviolet irradiation, heating with a heater, or hot air drying with a hair dryer. In addition, the number of times a mask is reused should be strictly controlled to avoid excessive use that may compromise its protective effectiveness. High-level protective masks such as surgical masks and medical N95 masks are not recommended for reuse, as they have specific protective performance and structural requirements, and reuse may reduce their protective effectiveness.