Coronavirus can linger in air of crowded or unventilated spaces for hours, study finds

Coronavirus can linger in the air in crowded spaces and rooms that lack ventilation, such as toilets, for hours, according to a new study by scientists who now recommended wearing masks in public. While the transmission of the virus from direct human contact and through respiratory droplets, such as coughing or sneezing, is clear, the potential for airborne transmission is much less understood. The World Health Organisation has said the risk is limited to very specific circumstances, pointing to