Double-masking, as recommended by the U.S. Centers for Disease Control and Prevention, yields limited benefits in preventing the spread of droplets that could transmit Covid-19 compared to a single well-fitted disposable mask, according to an analysis conducted with a Japanese supercomputer.
Researchers at Japan's Riken research institute and Kobe University used Fugaku, the world's fastest supercomputer, to model droplet dispersal.
The simulation demonstrated that wearing just one tightly-fitted disposable mask prevented the spread of 85% of virus-bearing particles, while wearing two masks prevented only 89%.
One well-fitted mask captured 81% of the droplets, compared to 69% by one loosely-fitted mask.
The researchers observed that a tight fit and avoiding gaps in the mask were essential to blocking droplet spread.
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Abstracts Copyright © 2021 SmithBucklin, Washington, DC, USA