Researchers from Florida Atlantic University examined different materials and designs to find the best option for slowing the spread of virus carrying droplets.

https://www.dailymail.co.uk/sciencetech/article-8475437/Bandana-style-masks-significantly-worse-homemade-cotton-coverings.html?ns_mchannel=rss&ito=1490&ns_campaig n=1490 ]قرااء المزيد ..... [/url]


Coronavirus: Cotton masks more protective than bandanas