Aerosols

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How much of the air you’re breathing is air someone else exhaled? And in the midst of a pandemic caused by an airborne virus, where are the riskiest places to be? In the first in a series of five stories Farah Hancock reports on hot spots of hazardous air. https://www.rnz.co.nz/news/in-depth/470690/whose-breath-are-you-breathing

Jarry, Jonathan M.Sc., “With COVID-19, Air Is Both the Problem and the Solution” Office for Science and Society McGill University,15 Jan 2022 SARS-CoV-2 can linger in the air. Dealing with it can be relatively easy, but first, we have to admit we have a problem https://www.mcgill.ca/oss/article/covid-19/covid-19-air-both-problem-and-solution On March 28, 2020, at the beginning of the […]

Rich graphic simulation of a simulated drop of liquid including the coronavirus and its spike proteins, long mucins, sticky surfactants, and a mixture of molecules from deep lung fluid, showing how the virus survives inside tiny airborne particles (created by Lorenzo Casalino and Abigail Dommer, Amaro Lab, U.C. San Diego) https://www.nytimes.com/interactive/2021/12/01/science/coronavirus-aerosol-simulation.html To better understand the […]

https://phys.org/news/2021-11-ventilation-airflow-covid-.html As we approach two full years of the COVID-19 pandemic, we now know it spreads primarily through airborne transmission. The virus rides inside tiny microscopic droplets or aerosol ejected from our mouths when we speak, shout, sing, cough, or sneeze. It then floats within the air, where it can be inhaled by and transmitted. […]

ABSTRACT Air-borne transmission can pose a major risk of infection spread in enclosed spaces. Venting the air out using exhaust fans and ducts is a common approach to mitigate the risk. In this work, we study the air flow set up by an exhaust fan in a typical shared washroom that can be a potential […]

CDC recommends a layered strategy to reduce exposures to SARS-CoV-2, the virus that causes COVID-19. This includes using multiple mitigation strategies with several layers of safeguards to reduce the spread of disease and lower the risk of exposure. While it may not be necessary to apply every consideration to be protective, implementing multiple mitigation strategies […]

We find that airborne transmission likely accounted for >50% of disease transmission on the Diamond Princess cruise ship, which includes inhalation of aerosols during close contact as well as longer range. These findings underscore the importance of implementing public health measures that target the control of inhalation of aerosols in addition to ongoing measures targeting control of […]

https://www.cbc.ca/news/canada/british-columbia/outdoor-transmission-covid-winter-1.5878531

study in Wuhan of around 27K households with around 29K primary covid cases & 27K contacts found that children and adolescents (<20y) were one and a half times more likely to be infectious to others than adults>60y. They had higher infectivity than those aged 20-39 & 40-59. https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(20)30981-6/fulltext