We have recently audited a number of schools, it was noted both by the audit and through discussion that some schools think it is acceptable to remove self closing devices from fire doors or to wedge them open to improve ventilation.
This of course prevents them from closing properly and in some cases not closing at all!
It is a requirement that escape routes from specific areas are protected by 30 minute fire resistant construction, this includes having effective fire doors to the correct standard.
During one audit we contacted the fire service and discussed the issue, they confirmed that fire doors should be maintained in an effective condition.
A simple thing such as an ineffective door may allow toxic smoke and fire gases to spread quickly and compromise an escape route.
Fires these days develop up to eight times faster than fifty years ago due to the modern materials that we all use, many of these are manufactured from petroleum based products and so burn like petrol when exposed to heat.
The provision of effective fire doors in any property is major player in the effective fire compartmentation of a building.
Remember that fire and smoke will kill you far quicker than any virus!