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Aerosols

Tang, J.W., Bahnfleth, W.P., et al. 2021. “Dismantling myths on the airborne transmission of severe acute respiratory syndrome coronavirus (SARS-CoV-2).” Journal of Hospital Infection, Review Article, January 12, 2021.

The Covid-19 pandemic has caused untold disruption and enhanced mortality rates around the world. Understanding the mechanisms for transmission of SARS-CoV-2 is key to preventing further spread but there is confusion over the meaning of “airborne” whenever transmission is discussed. Scientific ambivalence originates from evidence published many years ago, which has generated mythological beliefs that […]

Lednicky, J.A., Lauzardo, M., et al. 2021. “Isolation of SARS-CoV-2 from the air in a car driven by a COVID patient with mild illness.” medRxiv 2021.01.12.21249603

We used a Sioutas personal cascade impactor sampler (PCIS) to screen for SARS-CoV-2 in a car driven by a COVID-19 patient. SARS-CoV-2 was detectable at all PCIS stages by PCR and was cultured from the section of the sampler collecting particles in the 0.25 to 0.50 μm size range. https://www.medrxiv.org/content/10.1101/2021.01.12.21249603v1 PDF: https://www.medrxiv.org/content/10.1101/2021.01.12.21249603v1.full.pdf

Johansson, M.A., Quandelacy T.M., Kada S., et al. “SARS-CoV-2 Transmission From People Without COVID-19 Symptoms.” JAMA Network Open, 2021;4(1):e2035057.

Question  What proportion of coronavirus disease 2019 (COVID-19) spread is associated with transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) from persons with no symptoms? Findings  In this decision analytical model assessing multiple scenarios for the infectious period and the proportion of transmission from individuals who never have COVID-19 symptoms, transmission from asymptomatic individuals was estimated […]

LETTER: “Time for government to take aerosol transmission of COVID-19 seriously”

The following open letter from 363 Canadian experts was sent to the prime minister, premiers and chief medical officers of the federal, provincial and territorial governments. We are a group of physicians, scientists, occupational health and safety experts, engineers and nursing professionals who have been following COVID-19 developments closely. We are deeply concerned by the […]

Port, J.R., Yinda, C.K., et al. 2020. “SARS-CoV-2 disease severity and transmission efficiency is increased for airborne but not fomite exposure in Syrian hamsters.” bioRxiv 2020.12.28.424565

Transmission of SARS-CoV-2 is driven by contact, fomite, and airborne transmission. The relative contribution of different transmission routes remains subject to debate. Here, we show Syrian hamsters are susceptible to SARS-CoV-2 infection through intranasal, aerosol and fomite exposure. Different routes of exposure presented with distinct disease manifestations. Intranasal and aerosol inoculation caused more severe respiratory […]

Prather, Kimberly A., Marr, Linsey C. et al. 2020. “Airborne transmission of SARS-CoV-2.” Science Vol. 370, Issue 6514, pp. 303-304. 16 Oct 2020.

There is overwhelming evidence that inhalation of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) represents a major transmission route for coronavirus disease 2019 (COVID-19). There is an urgent need to harmonize discussions about modes of virus transmission across disciplines to ensure the most effective control strategies and provide clear and consistent guidance to the public. […]

SCIENCE NEWS: “New science reevaluates risks of indoor dining”

“New science reevaluates risks of indoor dining” Globe & Mail By Dasia Moore Globe Staff December 19, 2020 Although few clusters have officially been traced to restaurants, research suggests inside eating is not necessarily a safe environment https://www.bostonglobe.com/2020/12/19/metro/superspreader-destinations-what-makes-indoor-dining-during-covid-19-so-risky/

MacIntyre, C.R. and M.R. Ananda-Rajah. 2020. “Scientific evidence supports aerosol transmission of SARS-COV-2.” Antimicrobial Resistance & Infection Control 9, Article number 202.

We question the evidence cited by Conly et al. [1] to justify recommending masks for routine care of COVID-19 patients. As evidence, the authors cite the R0 and include several references that are not primary research, and only two primary studies. One of these is a study of hospital contamination which found evidence of surface […]

Hwang, S.E., Chang, J.H., et al. 2020.”Possible Aerosol Transmission of COVID-19 Associated with an Outbreak in an Apartment in Seoul, South Korea, 2020″ International Journal of Infectious Diseases, December 16, 2020.

Scientists have strongly implied that aerosols could be the plausible cause of COVID-19 transmission; however, aerosol transmission remains controversial. The study We investigated the epidemiological relationship among infected cases on a recent cluster infection of COVID-19 in an apartment building in Seoul, South Korea. All infected cases were found along two vertical lines of the […]

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