抄録
Under the COVID-19 pandemic, many types of masks for particulate matters are used at hospital wards and public spaces over the world. These masks are based on air filtration of aerosol particles but the shapes and the performances run the whole gamut. In this topic, the general features of these masks, such as the requirements of dust respirator in national standards, the collection mechanisms of aerosol particle by air filter, and the fit test for the respirators, are stated. The authorized masks in Japanese market have enough filtration performance but the suitable selection and the decent use of these masks for each wearer are apt to be neglected. The fit tests of mask and the face of wearer are explained for better respiratory protection.
