Classic case of airborne superspreader event

Great quotes:

“A five-micron particle will be airborne for 25 minutes and travel up to 400 metres indoors, so that’s a lot further than any of your social distancing.” https://twitter.com/orla_hegarty/status/1347879426957172737

“use a carbon-dioxide sensor to check if the rate of C02 was above 600, a rate where ventilation could be required.”
“You can tell a space is poorly ventilated if it has high C02,” she said.

“while aerosols would always be in their highest density closest to a person, they could remain in the air for a long time when there was low relative humidity.”

“We need to put a bit more effort into encouraging people to try to clean air in their restaurants," he said.