Pupils have twice been evacuated from classrooms at a New Forest, England, school after air monitors indicated the potential for a build-up of coronavirus.
Instruments have been installed at Ashley Junior School in all teaching spaces to measure the density of carbon dioxide being breathed out in a room by pupils and staff.
Once it hits a certain scale, a warning alerts teachers that fresh air is required as the atmosphere has become too stale and may contain unsafe amounts of coronavirus from potentially infected people.
