Double-masking 'is only slightly better at stopping the spread of Covid'

[السياسي]

Japanese researchers said wearing one surgical mask that is fitted correctly could stop 85 per cent of viral particles from passing through. Effectiveness only went up to 89 per cent when double-masking.

https://www.dailymail.co.uk/news/article-9328747/Japan-supercomputer-shows-doubling-masks-offers-little-help-preventing-viral-spread.html?ns_mchannel=rss&ito=1490&ns_campaign=1490 ]قرااء المزيد ..... [/url]