Government is stressing how good ventilation can reduce the risk of coronavirus infection by over 70%.

It is important that businesses check that their ventilation systems are clean and working properly. Where businesses do not have ventilation systems, the advice is to either open windows for short, sharp bursts of 10 to 15 minutes regularly throughout the day or to leave windows open a small amount continuously. 

There is a supporting film which, although based on residential properties, may be helpful in business environments.