Scientists also found that even a tiny gap could reduce the effectiveness of face masks by half, highlighting the importance of a good fit.
Masks provide a barrier, effectively blocking the respiratory droplets released when we sneeze, cough and breathe from reaching a new host.
Using a fan, the team blew different sized particles, ranging from 10 nanometers to 6 micrometers in diameter, towards a sample of fabric. The rate of airflow was tweaked to match the speed of a person's breathing at rest. However, they warn the benefits of a cotton-silk mask could be undone if the mask isn't sitting tight. The researchers found even a one percent gap could reduce their effectiveness of filtering particles by half.shows the number of confirmed COVID-19 cases in the U.S. as of April 24, 2020.Centers for Disease Control and Prevention Advice on Using Face Coverings to Slow Spread of COVID-19
Practice safe removal of face coverings by not touching eyes, nose, and mouth, and wash hands immediately after removing the covering.Clean hands frequently with soap and water, or alcohol-based hand rub.
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