‘Letting in the fresh air lowers risk of infection’ Catherine Noakes, professor of environmental engineering at Leeds University, says:

“As Christmas is coming people will naturally be spending more time indoors, welcoming friends and family into their home and attending social events together.

“While we are all looking forward to spending time with friends and family, it’s important to remember that coronavirus is still spreading and can easily transmit in the home, even when people are vaccinated. In an enclosed space, infectious particles hang around in the air like smoke and can build up over time.

“This increases the risk of other people in the room breathing in the virus, especially if there is no ventilation or fresh air helping to refresh the air. “That’s why it’s important to ventilate indoor spaces by opening windows, even if just regularly for a short time

– so fresh air can disperse Covid-19 particles to decrease the risk of others being infected.”