బావున్నారా అండీ !! <br /><br />This is an Explainer video about history of medical masks in a detail format for better understanding !!<br /><br /><br />watch completely for intersting questions like<br /><br />Which mask should i use ? how to test a mask quality<br /><br />The medical masks date back from 1910 in china <br /><br /><br />Watch the video completely for better understanding!!<br /><br />Also Follow me on<br />Facebook : fb.me/agvaashajeevi<br />Instagram @agvaashajeevi<br /><br />Thanks for watching!!<br /><br /><br />Do subscribe and activate notifications<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />Disclaimer- Some contents are used for educational purpose under fair use. Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use<br /><br /><br /><br /><br />Image Credits<br />Creator: Aleksandr Zubkov<br />Credit: Getty Images<br />Image by mohamed Hassan from Pixabay <br />Image by "The Rev" Deborah Windham from Pixabay <br />Image by Peggy und Marco Lachmann-Anke from Pixabay <br />Photo by JC Gellidon on Unsplash<br />Photo by Tai's Captures on Unsplash<br />Photo by Jon Tyson on Unsplash<br />Photo by bruce mars on Unsplash<br />Photo by Science in HD on Unsplash<br />Photo by The New York Public Library on Unsplash<br />Photo by Giammarco Boscaro on Unsplash<br />Photo by Victor He on Unsplash<br />Photo by Anshu A on Unsplash<br />Photo by CDC on Unsplash<br />Photo by KOBU Agency on Unsplash<br />Video by Emilio Amador from Pixabay <br />Image by Peter Ziegler from Pixabay <br />Image by DarkWorkX from Pixabay <br /><br />MUSIC CREDITS<br />https://mixkit.co/free-stock-music<br /><br /><br />Video by Engin Akyurt from Pixabay mask<br />Video by Engin Akyurt from Pixabay <br />Video by Mario Malic from Pixabay <br />Video by jaumeps99 from Pixabay<br />Video by tomalauphi from Pixabay <br />Video by Peter Perhac from Pixabay <br />Video by Emilio Amador from Pixabay <br />Video by ismael Sosa from Pixabay <br />Video by Mario Aranda from Pixabay <br />Video by Mezz Anjani from Pixabay <br />Video by CryptoSkylark from Pixabay<br />Video by Christian Bodhi from Pixabay <br />Video by jorono from Pixabay <br />Video by romanakr from Pixabay <br />Video by jLasWilson from Pixabay <br />Video by Tomislav Jakupec from Pixabay <br />Video by Roy Buri from Pixabay <br />Video by Emagrecer saúde from Pixabay <br />Video by Julien Tromeur from Pixabay <br />Video by motionstock from Pixabay <br />Video by Александр Стасюк from Pixabay <br />Video by Oleg Gamulinskiy from Pixabay <br />You can use the following text:<br />Video by DistillVideos from Pixabay <br />Video by Adesh Kumar Singh from Pixabay<br />Video by Dsndrn-Videolar from Pixabay <br />Video by Coverr-Free-Footage from Pixabay<br />Video by Dsndrn-Videolar from Pixabay <br />Video by Tibor Janosi Mozes from Pixabay <br />Video by Vimeo-Free-Videos from Pixabay <br />Video by chuduyen215 from Pixabay <br />Video by niko Jimsheleishvili from Pixabay <br />Video by Artyom Ermolin from Pixabay <br />Video by Luiz Jorge de Miranda Neto- Luiz Jorge Artista from Pixabay <br />Video by Raul Chavelas from Pixabay <br />Video by Coverr
