Effectiveness of Cloth Masks Depends on Type of Covering: Researchers found N95 masks to be the most effective at reducing the horizontal spread of a cough. The N95 masks reduced a cough’s initial velocity by up to a factor of 10 and limit its spread to between 0.1 and 0.25 meters

Effectiveness of Cloth Masks Depends on Type of Covering: Researchers found N95 masks to be the most effective at reducing the horizontal spread of a cough. The N95 masks reduced a cough’s initial velocity by up to a factor of 10 and limit its spread to between 0.1 and 0.25 meters: https://ift.tt/2QrHHVb Read more... https://ift.tt/2Qq9Njx