COVID-19: How to make indoor spaces safer

Ventilation is the introduction of fresh air into an indoor space while the stale air is pushed outside. Whether at home or in public buildings, such as schools and offices, ventilation can be improved by simply opening windows and doors whenever possible. Luca Fontana, a water, sanitation and hygiene (WASH) specialist consultant at the WHO, told Al Jazeera ventilation is “one part of the big package of infection prevention and control measures” along with physical distancing, hand hygiene and face masks.