Is Your Homemade Face Mask Thick Enough?
When it comes to face masks, it's like toilet paper: two plys always beats one.
That's the word from researchers in Australia, who've published their findings in the medical journal Thorax.
While face masks can help prevent the spread of COVID-19 by hampering the dispersal of tiny droplets of moisture that can transmit the disease to others, even homemade masks should have two layers to be truly effective, as recommended by the Centers for Disease Control and Prevention.
Using various types of masks made from different materials, the researchers used high-speed cameras and other technology to track the dispersal of droplets while test subjects talked, coughed and sneezed.
While a three-ply surgical mask was deemed the most effective at curbing droplet dispersal, not everyone has access to those. The scientists confirmed that two-layer and even single-layer masks can provide protection while a subject is speaking. However, the two-ply mask is where it's at for protection when it comes to coughing and sneezing.
So do your part and double-up, DIYers.