At 75cm, the concentration increased by 2.8 times and 3.7 times during the use of an automated or traditional vacuum cleaners respectively, she added. While using a vacuum cleaner, people should wear an anti-dust mask and avoid standing behind its exhaust, she said, adding that it is best to avoid vacuuming when children are nearby. Children should not enter a room that has been vacuumed until 90 minutes have passed, which is about how long it takes for particulate matter to settle, she said. Exposure to high concentrations of endotoxins can increase children’s risk of asthma or allergies 4.8 times over exposure to normal levels, she said. Bed sheets and duvet covers should be washed and changed frequently, and an air purifier could also help maintain a clean environment, she added.
