This was after the CDC released last month a study showing that layering a cloth mask on top of a surgical mask provides additional protection.
In a new guidance released by the California Department of Public Health, officials said: Double masking is an effective way to improve fit and filtration..
According to the CDC, recent studies have shown that double masking reduces human exposure by 95%.
Copyright © 2021 KABC-TV. all rights reserved.
California now recommending double masking following new CDC guidance Source link California now recommending double masking following new CDC guidance