The study also found air pollution did not stay in the kitchen. Median concentrations in dining areas were greater than WHO guidelines for outdoor air pollution.

Dr Yannai Kashtan, first author of the study from PSE Heathy Energy, said: “It is difficult to contextualise the relative risk to diners, but as a diner in a restaurant with gas-fired appliances you may be exposed to elevated levels of nitrogen dioxide.”

ffs, wear a mask.

We're in a viral lethal highly contagious pandemic. Everyone inside should he wearing a mask in any case.