There are pages of results on Youtube, such as https://www.youtube.com/watch?v=HluIkTbTBIw https://www.youtube.com/watch?v=HluIkTbTBIw for a respirator type mas

There are pages of results on Youtube, such as https://www.youtube.com/watch?v=HluIkTbTBIw https://www.youtube.com/watch?v=HluIkTbTBIw for a respirator type mask. I would also recommend if you are following the procedure with a reused mask to immediately wash your hands afterwards since you will be touching a contaminated surface. Guides assume you are using a fresh mask, per health worker procedures.