Just posted a brief, informative & instructional video on face masks via Instagram. My hopes is that it'll help you understand why & how this works. Click here or the image below to view the video. I've also added references to which you can check for yourself further down the page.
I stress the importance of being more informed with current science & evidence, as to avoid a case of Semmelweis reflex & help combat the sars-cov-2 pandemic, for the benefit of each & everyone o