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If you are living and breathing in Canada you need to read this document. It helps put the current DISASTER into perspective and helps to explain current outcomes.“Transmission Routes for COVID-19: Implications for Public Health” https://cihr-irsc.gc.ca/e/52238.html#5.2
Should add - lots of life saving information found here that should not wait to be put into practice.
What’s this all about? 
on Part 1
“A division exists among experts on the definition of an aerosol, the degree of infectivity of the SARS-CoV-2 in aerosols, when aerosols are generated, and what role aerosols may be playing in human-to-human transmission.”1/20
on Part 1“A division exists among experts on the definition of an aerosol, the degree of infectivity of the SARS-CoV-2 in aerosols, when aerosols are generated, and what role aerosols may be playing in human-to-human transmission.”1/20
September 28th and October 1st, 2020 major think tanks tackled the issue of aerosol spread! Included @CPHO_Canada @GovCanHealth @CIHR_IRSC (host) @CADTH_ACMTS and many familiar names.2/20
Objective: “if the model is shown to be incorrect and in fact aerosols are generated by that activity, and under certain circumstances are infectious, then the prevention advice will need to reflect the new model.”3/20
“very impressed by the expertise of the internationally recognized speakers and participants, and looked forward to learning more from the findings” @CPHO_Canada 4/20
Presentation 1: by @DFisman Highlights “COVID-19 is over-dispersed so super-spreader events are interspersed with individuals who are associated with few or no transmission events; most secondary infections come from a minority of primary infections” 5/20
Significant highlight for prevention and target of presymptomatic/asympmtomatic transmission 6/20:
“In settings where there are no face coverings, prolonged exposure, and poor ventilation, there is a higher risk.” i.e. long term care vulnerable due to lack of source control. 7/20
“Giving contradictory guidance has made the public question its validity (e.g., 30 children in a classroom versus no indoor gatherings of more than 10 people allowed). It is important to provide honest messaging about how COVID-19 does and does not transmit.” 8/20
SIGNIFICANT: cue the expert @jljcolorado? 9/20
Presentation 2: Modes of Transmission of SARS-CoV-2: Some Thoughts from a Public Health Virology Perspective @MarionKoopmans 10/20
Highlights: 11/20
Split between physics and IPAC? 12/20
Outbreak reports - inconclusive yet ventilation has a role. Animal studies show airborne transmission. 13/20
Presentation 3: The Science and Control of Airborne Infection Transmission
Dr. Lidia Morawska 14/20
Dr. Lidia Morawska 14/20
“For the purposes of this talk, they all will be referred to as particles” as there is different definitions used for aerosol size. 15/20
Highlights: “All respiratory activities, including breathing, generate particles, but vocalization generates higher emissions than other activities.” 16/20
SIGNIFICANT from Dr. Lidia Morawska: 17/20
Which tool by what team? Very intriguing: 18/20
Favourite comment “... If aerosols play no role in viral transmission, there is no basis to recommend that people should stay at home, or that ventilation is needed. We wouldn’t even need a mask; a face shield alone would suffice” 19/20
19/20
Least favourite comment: “It is important to recognize that we did nothing about controlling ventilation in the first phase of the outbreak, but we did control transmission.” Will add at cost of lockdown, deaths and disability. 20/20
