Coronavirus seems to hang in the air in crowded spaces or rooms without ventilation.
People produce two types of droplets when they breathe, cough or talk. Larger ones fall to the ground. Smaller ones — aerosols — can hang in the air for hours.
Researchers at Chinese hospitals have found few aerosols containing the virus in hospital wards, supermarkets or residences.
Many more were found in toilets and spaces with large crowds, according to Bloomberg News.
Very high amounts were in rooms where medical staff take off protective clothing. This could mean that virus on masks and clothing becomes airborne again.
The research shows the importance of ventilation, limiting crowds and careful sanitation.
