Ventilation can make schools and offices safe from covid-19 – but how?

AS THE nights begin to draw in and schoolchildren across the northern hemisphere start trooping back into the classroom, there are three words that ought to be inscribed on every blackboard: ventilation, ventilation, ventilation.

“Ventilation is a critically important control measure for covid-19,” says Cath Noakes, an environmental engineer at the University of Leeds, UK, and a member of the UK government’s Scientific Advisory Group for Emergencies (SAGE).

Schools are a particular weak link in controlling the spread…