The Science of Masks

How do masks work? This video explains the science behind the use of masks to slow the spread of COVID-19. More videos coming soon. Please rate☝️, comment👇, and subscribe☝️ if you like them, so that I can make more! Please send through requests for topics to cover as well. What do you want to learn about? #scienceinmotion #COVID19 #facemasks #coronavirus
Music thanks to:
Growing Up by Scott Buckley / scottbuckley
Creative Commons - Attribution 3.0 Unported - CC BY 3.0
Free Download / Stream: bit.ly/_growin...
Music promoted by Audio Library • Growing Up - Scott Buc...
Some images thanks to:
Some images designed by pikisuperstar/ macrovector/ freepik: www.freepik.com
"World Health Organisation logo" by WHO is licensed under CC BY 3.0
"Center for Disease Control and Prevention logo" by CDC is licensed under CC BY 3.0
Publications referenced:
Chughtai AA, Seale H, Macintyre CR. Effectiveness of cloth masks for protection against severe acute respiratory syndrome coronavirus 2. Emerg Infect Dis 2020 Oct [10 Aug 2020].
World Health Organization. (‎2020)‎. Advice on the use of masks in the context of COVID-19: interim guidance, 5 June 2020. World Health Organization. apps.who.int/i.... License: CC BY-NC-SA 3.0 IGO
Anfinrud P, Stadnytskyi V, Bax CE, Bax A. Visualizing Speech-Generated Oral Fluid Droplets with Laser Light Scattering. New England Journal of Medicine. 2020;382(21):2061-3.
Bahl P, Bhattacharjee S, de Silva C, Chughtai AA, Doolan C, MacIntyre CR. Face coverings and mask to minimise droplet dispersion and aerosolisation: a video case study. Thorax. 2020:thoraxjnl-2020-215748.
Furukawa N, Brooks J, Sobel J. Evidence Supporting Transmission of Severe Acute Respiratory Syndrome Coronavirus 2 While Presymptomatic or Asymptomatic. Emerging Infectious Disease journal. 2020;26(7).
Leung NHL, Chu DKW, Shiu EYC, Chan K-H, McDevitt JJ, Hau BJP, et al. Respiratory virus shedding in exhaled breath and efficacy of face masks. Nature Medicine. 2020;26(5):676-80.
Oran, Daniel P., and Eric J. Topol. "Prevalence of Asymptomatic SARS-CoV-2 Infection: A Narrative Review." Annals of Internal Medicine (2020).
Chu, Derek K., et al. "Physical distancing, face masks, and eye protection to prevent person-to-person transmission of SARS-CoV-2 and COVID-19: a systematic review and meta-analysis." The Lancet (2020).
Cheng, Kar Keung, Tai Hing Lam, and Chi Chiu Leung. "Wearing face masks in the community during the COVID-19 pandemic: altruism and solidarity." The Lancet (2020). doi.org/10.101...
Hendrix MJ, Walde C, Findley K, Trotman R. Absence of Apparent Transmission of SARS-CoV-2 from Two Stylists After Exposure at a Hair Salon with a Universal Face Covering Policy - Springfield, Missouri, May 2020. MMWR Morb Mortal Wkly Rep 2020;69:930-932. DOI: dx.doi.org/10.1... icon.
Leffler C, Ing E, Lykins J, Hogan M, McKeown C, Grzybowski A. Association of country-wide coronavirus mortality with demographics, testing, lockdowns, and public wearing of masks (Update June 15, 2020). 2020.
Lyu W, Wehby GL. Community Use Of Face Masks And COVID-19: Evidence From A Natural Experiment Of State Mandates In The US. Health Affairs. 2020;39(8):1419-25.
Schwartz KL, Murti M, Finkelstein M, Leis JA, Fitzgerald-Husek A, Bourns L, et al. Lack of COVID-19 transmission on an international flight. Canadian Medical Association Journal. 2020;192(15):E410.
Fischer EP, Fischer MC, Grass D, Henrion I, Warren WS, Westman E. Low-cost measurement of facemask efficacy for filtering expelled droplets during speech. Science Advances. 2020:eabd3083.
Brosseau L & Ann B R. N95 Respirators and Surgical Masks, NIOSH Science Blog. Centers for Disease Control and Prevention (14 Oct 2019). Available at: blogs.cdc.gov/...

[@rsmahadeva]

Well done Sathana. Well explained, simple language and concise

[@davidseignior3416]

Very clear, succinct and scientific explanation, thank you!

[@targetline_]

Care to do a video of the biological effects of the person wearing a mask

[@peterforsythe3643]

As of today, nearly three years later, no randomised trial proves mask effectiveness. And no, anecdotes don’t count!

[@msimmons2]

Lies lies lies liars.