Prof Noakes said that a “revolution” is needed in how governments regulate indoor air quality and in how the issue is handled in degree and apprentice courses.

Another scientist involved is Dr Julian Tang, honorary associate professor and clinical respiratory virologist at the University of Leicester.

He says indoor spaces with poor ventilation are a threat as potential infection hotspots “because the risks shoot up when virus particles accumulate”.

“We all want to be confident that the air in our homes and the buildings and restaurants we visit is clean.”

So there’s a proposal for public places to have “ventilation certificates”, like those for hygiene.

Dr Tang says that by having that reassurance about air quality, “we will see restaurants more easily regaining diners’ trust, and employees more confidently returning to offices”.

Calls for post-Covid ‘revolution’ in building air quality – BBC News