Wearing a face covering in a number of public places and on transport is now mandatory in England, although there are some exemptions.
COVID-19 spreads through the air by droplets and aerosols that are exhaled from the nose and mouth of an infected person. The government expects and recommends that people wear face coverings in crowded areas such as public transport.
When a person infected with COVID-19 coughs, talks or breathes, they release droplets and aerosols which can be breathed in by another person.
Fresh air blows away these particles, reducing the chances of COVID-19 spreading. It's always worth considering if you can meet outdoors or, if you're indoors, thinking about how you can improve ventilation by letting fresh air in.
The more fresh air you let into your home or other enclosed spaces, the less likely a person is to inhale infectious particles.
You can let in fresh air by uncovering vents and opening doors and windows. Don't prop fire doors open.
If you have an extractor fan at home, (for example in your bathroom or kitchen), think about leaving it running for longer than usual with the door closed after someone has used the room. This is particularly important when meeting people you don't live with indoors.
If you are concerned about noise, security or the costs of heating, opening windows for shorter periods of time can still help to reduce the risk of the virus spreading.
Wearing extra layers can help you to keep warm. You may be able to change the layout of your room so that you do not sit close to cold draughts from open windows or doors.