Proper Fit Matters: Study Questions Effectiveness of Double Masking for COVID-19
![Double layers increase filtering efficiency only with good mask fit but could also lead to breathing difficulties.](https://healthwire.co/wp-content/uploads/2022/05/mask-covid.jpg)
The study published in Physics of Fluids, suggests double masking with improperly fitted masks may "not significantly improve mask efficiency and produces a false sense of security".
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