With social distancing restrictions ending in England and easing further in Scotland on 19 July, good ventilation will remain very important in avoiding Covid.
For months we’ve been told to wash our hands and maintain social distancing to beat the virus.
But scientists and engineers say we also need to think about the air we breathe inside buildings.
Good ventilation matters in five ways.
1: If it’s stuffy, walk away
When you walk into a room and the air feels stale, something is wrong with the ventilation.
Not enough fresh air is being introduced, which increases your chances of getting infected by coronavirus.
Recent research shows that in confined spaces there can be “airborne transmission” of the virus – with tiny virus particles lingering in the air.
So if a place seems stuffy, just turn around and leave, says Dr Hywel Davies, technical director of the Chartered Institution of Building Services Engineers.