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Joshua C. Agar Profile picture
@JoshuaCAgar
Oct 10, 2021 • 12 tweets • 3 min read • Read on X
Scrolly
Taytay Chronicles w/ Bayaw Erik
(October 10, 2021)
The dreaded face shield
How to assemble and "use" face shields
Changes (construction) in Taytay...
J.P.Rizal Ave.
The only purpose of face shields: entry/gate pass
Saw a humidifier along the way....

Attempted visualization...to no avail.
Finding the TV Rack that I'm looking for.
Going with the beat.
Ventilation recommendation: exhaust fans
Face shields as rain visors.

(Lumang palengke)
That concludes the goofy saga with @JERMAG07

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More from @JoshuaCAgar

Joshua C. Agar Profile picture
Dec 21, 2023
Our study that developed CO2 monitors that informed occupants of the relative risk that they may be subjected to due to airborne diseases transmitted through shared room air transmission has been published. #CovidIsAirborne

doi.org/10.3389/fbuil.…
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Using a multivariate method, the ventilation rates of different indoor spaces are determined and used for the subsequent computations using the Wells–Riley model to derive the respective infection risk, particularly of COVID-19. Image
"Infection risks are determined to be higher in indoor spaces with low ventilation rates. However, having high ventilation rates does not mean low infection risks as smaller spaces will also have higher infection risks."
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Read 7 tweets
Joshua C. Agar Profile picture
Dec 12, 2023
Part of the PowerPoint presentation to be presented on Thursday:

How aerosols move Image
Conservation of Mass
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Infection risk modeling

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Read 4 tweets
Joshua C. Agar Profile picture
Apr 23, 2023
High humidity also attributes to high infection rates and deaths due to Covid-19.

Shown below are the trends derived from the correlation between Covid-19 deaths and relative humidity. 60% RH is the Goldilocks Zone: lesser or greater than that results in the increase of the risk Image


Why 60%?

It has to do with two things: (1) lessening evaporation rates due to inhomogeneous mixing and (2) rate of condensation which attributes to the increase of pore pressure within the mask.royalsocietypublishing.org/doi/10.1098/rs…
Countries above the tropics experience case surges during their winter season when relative humidity is low. The hot and humid respiratory emissions will mix with the cold and dry indoor air resulting in higher evaporation rates,
Read 7 tweets
Joshua C. Agar Profile picture
Feb 5, 2023
When used in physical settings, the Cochrane method and RCTs are mere pretentious eminence-based assertions masquerading as empiricism (A thread).

It is important to note that the interventions mentioned are physical in nature, not clinical and medicinal. (1/n)
We have two studies that use the Cochrane method:

The first one is the study headed by Derek Chu (funded by WHO) in 2020, which has determined, using the Newcastle Ottawa Scale & Cochrane method, the effectiveness of face masks in stopping transmission. (2/n)
The second one, headed by John Conly, uses the Cochrane method whose results are being interpreted as "evidence" against face masks.

In fact, the study pointed out the inadequacy of the study design due to the high risk of bias when dealing with physical interventions. (3/n)
Read 7 tweets
Joshua C. Agar Profile picture
Nov 3, 2022
Testing the filtration efficiency (how much they reduce Covid-19 risk) of mask. #COVIDisAirborne

KN95 Mask
Copper/Cloth Mask
Surgical mask (the one bought from any vendor). This assumes observance of fit.
Read 4 tweets
Joshua C. Agar Profile picture
Nov 1, 2022
With no regard to the limits on occupancy and social distancing, here are the reproduction numbers from scenarios where a symptomatic infector within a 40-student DepEd classroom, even though the 1000-ppm CO2 ventilation requirement was satisfied. #COVIDisAirborne Image
With no regard to the limits on occupancy and social distancing, here are the reproduction numbers from scenarios where an asymptomatic infector within a 40-student DepEd classroom, even though the 1000-ppm CO2 ventilation requirement was satisfied. #COVIDisAirborne Image
This is why masking is important: to prevent outbreaks such as this.

Whoever cooked up this bad idea should be responsible. Remember the names of the IATF members who supported this folly. Never forget what they did, along w/ JoeyCon & Fr. Austriaco who advocated mass infection.
Read 5 tweets

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