Double masking works

According the the U.S. Centers for Disease Control, double masking can block 92% of infectious particles. Researchers have concluded that layering a cloth mask over a medical procedural mask, such as a disposable blue surgical mask, can block 92.5% of potentially infectious particles from escaping by creating a tighter fit and eliminating leakage. This has led others to assert that layering a medical procedural mask, also referred to as a surgical mask, over an N95 mask, will provide even greater protection. Newly elected President Biden was an early adopter of the double mask, using it throughout at least half of his campaign and now into the White House.