Why I wear a mask indoors and out

  1. Amy Price, affected role editor program, The BMJ ; senior research scientist, Stanford University School of Medicine
  1. The BMJ
  1. aprice{at}bmj.com

Amy Price ’ s husband died from covid-19. She hopes that wearing a mask, outside and indoors, will protect other families from similar injury I became concerned in masks professionally when our Stanford testing ground director, Larry Chu, and I did some work about masks for aesculapian professionals and their use in the residential district. 1 We then teamed up with the World Health Organization and the Stanford professors Steven Chu and Yi Cui to improve information about masking piece in the community. 2 Five nurse friends of my daughter, who is a nurse practitioner working in intensive care, died from covid-19. Simple community mask wear helped keep my family virus-free until my husband was admitted to hospital with a crack femur. After four weeks of negative covid-19 tests in hospital, he then tested convinced and died in hospital from covid-19. He was alone from the ambulance travel until he died. none of us were allowed to visit even once .

Masks reduce droplet spread

In the hope that it protects other families from alike injury, I wear a disguise in public—indoors and outside—as well as physically distancing, avoiding crowd, and washing my hands regularly. A face covering does not immediately protect wearers from covid-19, because droplets containing the virus can pass through any gaps between the mask and the face. however, modelling suggests that droplets may travel an average of five feet with face covering but 12-30 feet when masks are not worn. 3 This is why physical distance matters. When an septic person is not wearing a masquerade, the virus can remain for many hours in floating aerosols. 3 Some people argue that residential district masks are powerless against aerosols. 4 evidence shows, however, that masks prevent most viral particles from escaping. 4 angstrom many as 40 % of people infected with SARS-CoV-2 have no symptoms. 5 But when we run, talk, cough, or sneeze, respiratory droplets are released into the air. 3 This is why I wear a disguise even external, wherever people might follow me—for example, in the park draw, on a city street, or in a line up. even masquerade wearing both inside and outside can help us protect each other by reducing spread at the generator, even when we don ’ deoxythymidine monophosphate know that we ’ ra infected. On the footing of our studies, 6 the World Health Organization immediately recommends a fabric mask of at least three layers of different materials. The outermost layer can be a polyester-cotton desegregate that is slenderly water system resistant so that droplets won ’ triiodothyronine wick in. The middle layer can be polypropylene or three ply disposable facial tissues. ultimately, the inmost layer might be a non-irritating piano cotton to wick moisture aside from the expression. The best masks fit snugly but well and cover mid-nose to under the chin and about to the ears. Moving or talking should not produce gaps or bulges. Breathing and talking should be effort-free. 6 We found that some materials were ampere effective as a surgical mask if charged with static electricity 6 : rub the clean dissemble with latex gloves or a credit card base for 30 seconds before practice. A like approach is used in constructing checkup protective equipment such as N95 respirators. overall, charging masks in this way can increase their efficiency by american samoa much as 30 %, and the impression can last for respective hours. 6

Treat it like your toothbrush

Treat your mask like your soup-strainer. Don ’ t share it with anyone, and keep it in a travel rapidly plastic bag when not in use. When you remove it, do so in a means that doesn ’ thyroxine scatter germs from the front of the mask to your face, and wash your hands after touching the mask. Your masquerade does not need bleaching agent or harsh chemicals, as these can be breathed into the lungs and causal agent harm. The mask can be just laundered with ardent water and soap to safely kill SARS-CoV-2. 7 During the pandemic the World Health Organization, the US Centers for Disease Control and Prevention, and mass media have reported international shortages of personal protective equipment, including masks. If everyone wore a face mask in public, what might it accomplish ? Hong Kong and New Zealand employed strong public health subscribe to implement mandatary face masks, indoors and outdoors, and physical distance. They were more successful than others at reducing viral spread. 8 Wearing a dissemble doesn ’ metric ton beggarly that you are weak or cowardly. It ’ s a way to protect vulnerable people around you. I am vaccinated, yet I wear a disguise whether I ’ thousand inside or outside, in solidarity with people who are even vulnerable .


  • Competing interests : I have read and understand BMJ policy on contract of interests and have no relevant interests to declare .
  • birthplace and peer review : Commissioned ; not outwardly peer review .

This article is made freely available for use in accord with BMJ ‘s web site terms and conditions for the duration of the covid-19 pandemic or until otherwise determined by BMJ. You may use, download and print the article for any true, non-commercial purpose ( including text and data mining ) provided that all copyright notices and craft marks are retained .https://bmj.com/coronavirus/usage


  1. ↵ price A, Chu L. Addressing covid-19 grimace mask shortages ( v 1.3 ). Learnly Anesthesia, Stanford AIM Lab COVID-19 Evidence Service. Updated 25 Mar 2020. hypertext transfer protocol : //stanfordmedicine.app.box.com/v/covid19-PPE-1-2
  2. ↵ World Health Organization. Advice on the use of masks in the context of COVID-19 : interim guidance, 5 June 2020 ( WHO/2019-nCov/IPC_Masks/2020.4 ). 2020. hypertext transfer protocol : //apps.who.int/iris/handle/10665/332293
  3. ↵ Verma S, Dhanak M, Frankenfield J. Visualizing droplet dispersion for face shields and masks with exhalation valves. Phys Fluids ( 1994 ) 2020 ; 32:091701.



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