The CDC Asks, "Do you have the right fit?" (By Neilia Bliss, RN, School Nurse and Anatomy & Physiology Instructor)

The CDC conducted experiments to assess two ways of improving the fit of medical procedure masks: fitting a cloth mask over a medical procedure mask, and knotting the ear loops of a medical procedure mask and then tucking in and flattening the extra material close to the face. Each modification substantially improved source control and reduced wearer exposure.
 
The CDC recommends this double-masking technique and tighter fitting masks.
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