They can also help stop you touching your nose and mouth, which prevents viruses moving from your hands in to your body.
If you want to spend time in a room with someone you live with, or a visitor, covering your face will help to reduce the spread of the virus if you cannot be 2 metres/6 feet apart. And open a window too!
This means that you can still spend time with other people in your home. Limiting how long you are in a room with others also helps - the longer you spend together the more viruses could enter your body.