A Compiled Thread For:

COVIDScienceOntario
@COVIDSciOntario

COVIDScienceOntario try and "Quote Tweet"
"this" particular tweet
This. Is. Different. 1/7. Yes, we’ve been at this for a year; we’re exhausted; “we’ve heard it all before”…. Today, our news is different. The situation is more serious. We also have options. Pls read these 7 tweets & share. #COVID19Ontario covid19-sciencetable.ca/sciencebrief/c…
This. Is. Different 2/7. Ontario is in more danger than before. New data: VOC are now dominant and lead to 62% higher risk of hospitalization, 114% higher risk of ICU; 40% higher risk of death. #COVID19Ontario
This. Is. Different 3/7. COVID is hitting YOUNGER. New data: with VOCs now dominant, 46% of ICU admissions (March 15-21) were younger than 60. #COVID19Ontario
This. Is. Different. 4/7. This time we know exactly what’s coming: VOC hits hardest 15-28 days after infection; Rising infections today are a clear map to more ICU and death within four weeks. #COVID19Ontario
This. Is. Different. 5/7. We’re not reacting the way we did before. We already have more ICU & hospitalization than we did when we locked down in December – off the same # of infections we had then. #COVID19Ontario
This. Is. Different. 6/7. We CAN do more: BE OUTSIDE. Risks are far lower. If you can take it outside, pls do. While outside: stay 2m apart, mask if you need to be closer. (Always mask if you must meet or work w/ others inside). #COVID19Ontario
This. Is. Different. 7/7 Vaccines Work. If you’re eligible, please get vaxxed NOW. If you know others who are eligible, help them make and keep appointments. Any vaccine approved by Health Canada is a good vaccine. #COVID19Ontario
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More from @Concern14923094

14 Feb
Trying to understand CO2 as a control.

I understand this is a simplification.
Q1

If: (background CO2) = (x)ppm "15 Students 1 Teacher"

If: control for infection risk is = +750ppm CO2

Room after 3 hours use =
CO2 meter reading rises to (x)+750 ppm

It is at this point:
CO2 meter reading =>"equal to or greater than"
(x)+750ppm that it becomes unsafe.
Q2

If so does it follow that using a 25ppm buffer

as long as:

CO2 meter reading =< "equal to or less than"
(x)+725ppm

it remains safe for as long as this remains so.
Read 8 tweets
13 Feb
Catchphrase:

HEPA plus Ventilation "IS" the Facemask of the Classroom!

"Everyone needs to find a way to understand this"
This is a simplified version obviously:

*=Relative Effect of

"(Volume of Area)+(*Masks)+(*HEPA)+(*Ventilation)+(*Distancing)=(Room Time)"

(Distancing=(calculation of *Masks+*HEPA+*Ventilation)
Therefore in respect of School Classrooms:

"(Classroom HxWxL)+(*Masks)+(*HEPA)+(*Ventilation)+(*Pupil Spacing)=(Classroom Time)"

(Pupil Spacing=(calculation of *Masks+*HEPA+*Ventilation)
Read 13 tweets
13 Feb
Would it be possible for a theoretical mathematician an expert in aerosole transmission and or ventillation to collaberate on the realtime effects of varying degrees of Ventilation vs Space Vs Children within a good safety margin in respect to classroom sizes and no. of students.
Some other parameters:
Air Changes and co2 monitoring.
Standard room sizes and cohort pupil sizes.
Volume of air in room (not all ceiling heights same.)
Movement to from classrooms. Length of lessons. etc.
A Cost benefit calculation could then be made in respect of price of equiptment vs cost to pupil numbers, education etc.

Or has this already been done addressed ?
Read 15 tweets
12 Feb
The current

"GOLD STANDARD" for Schools and Education !

America leads by example.

Operational Strategy for K-12 Schools through Phased Mitigation

cdc.gov/coronavirus/20…
1. Consistent implementation of layered mitigation strategies to reduce transmission of SARS-CoV2 in schools
2. Indicators of community transmission to reflect level of community risk
3. Phased mitigation and learning modes based on levels of community transmission
"additional layers of COVID-19 prevention in schools:
• Testing to identify individuals with SARS-CoV-2 infection to limit transmission and outbreaks
• Vaccination for teachers and school staff, and in communities, as soon as supply allows
Read 10 tweets
12 Feb
A glimmer of hope:

FINALLY FULL RECOGNITION !!!
#COVIDisAirborne

Fiona Bruce:
"I`m a Doctor in Melbourne vaccinations alone are not going to be enough"

"we need input from occupational hygienists, aerosol experts and ventilation engineers"
"why is there not national guidance which accepts the reality that airborne transmission is an important mode of spread for this virus and adopts the precautionary principle to protect workers from the airborne spread of this virus with fit tested n95 masks and other measures."
Read 17 tweets

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