Duke University tests effectiveness of masks
Study finds homemade cotton masks provide good coverage, neck 'gaiters' don't block moisture droplets News from Duke Health Special to the Lake Okeechobee News DURHAM, N.C. - Duke…
Study finds homemade cotton masks provide good coverage, neck 'gaiters' don't block moisture droplets News from Duke Health Special to the Lake Okeechobee News DURHAM, N.C. - Duke…