The Centers for Disease Control and Prevention (CDC) says to stem the spread of COVID-19, all Americans should wear a mask.
The New York Times says if one mask works, maybe two will be twice as nice.
“Football coaches do it. President-elects do it. Even science-savvy senators do it.
“Dr. Marr recommended wearing face-hugging cloth masks over surgical masks, which tend to be made with more filter-friendly materials but fit more loosely. An alternative is to wear a cloth mask with a pocket that can be stuffed with filter material, like the kind found in vacuum bags. But wearing more than two masks, or layering up on masks that are already very good at filtering, will quickly bring diminishing returns and make it much harder to breathe normally,” the paper writes.