CHANCES OF DEVELOPING
COVID-19 USING CO2 AS PROXY
FOR VENTILATION
Poor Ventilation Increases Chances of Developing COVID-19
92%
Infection Probability (%)
100
80
60
40
20
Neither masked
74%
57%
Both masked, surgical
48%
30%
29%
19%
8%
3%
400 ppm
1%
2%
600 ppm
800 ppm
1,000 ppm
1,500 ppm
CO2 Concentration Measured as Parts Per Million (ppm)
Both masked,
N95
2,000 ppm
Chart: Air Support Project, based on an illustration from Nous AΓ©rons Source: [wamura, N., Isutsumi, K.
CC BY-ND 4.0
SARS-CoV-2 airborne infection probability estimated by using indoor carbon dioxide. Environ Sci Pollut Res 30, 79227-79240 (2023).
Air Support
Project
Image: The chart shows infection probabilities (%) [y-axis] at different
C02 concentrations in parts per million (ppm) [x-axis] during an outpatient consultation in which the individuals were talking to each other over a period of 15 minutes, in 3 conditions: neither masked, both masked in surgical masks, both masked in N95 respirator masks Data retrieved from: SARS-CoV-2 airborne infection probability estimated by using indoor carbon dioxide (2023). | CC BY- ND 4.0
COVID-19 SERIES, PART 2 OF 7
AIR SUPPORT PROJECT
07.03.2026 07:13
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So someone with measles can spread it before they have symptoms, it can float in the air for hours and years later, they can develop new health complications?
26.02.2026 20:21
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I want to stress: COVID IS a test of moral integrity. You can check wastewater data in your area. Levels of community transmission are high where I am. I am just as vulnerable to COVID as I was in 2020. I would be safer if other people acknowledged that and took action to get boosters and wear N95s
23.02.2026 05:26
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Hannah and Zack having a selfie
Final weekend. One last push.
This is about whether you want local plumber Hannah Spencer or the extreme Reform candidate.
It's hope vs hate.
It's Greens vs Reform.
Hope can win.
22.02.2026 08:37
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Something the Government want you to forget...
19.02.2026 18:25
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All you have to do is mask.
Thatβs it.
That prevents you from checking out early.
It lets you keep your heart, brain & immune system intact.
Your kids wonβt get sick.
Your healthcare costs will sink.
Investing in respirators is the secret advantage.
3-4 purifiers in classrooms = next level
15.01.2026 14:34
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Renfrew Christie Dies at 76; Sabotaged Racist Regimeβs Nuclear Program
Holy hell, what an obituary
15.01.2026 16:57
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COVID, influenza etc are airborne, transmitted in bioaerosols that require routine wear of N95 / FFP2/3 respirators and high-quality ventilation to stop. If your hospital doesn't have both, the people making those decisions either don't care if you get infected, or are nearly a century out of date.
29.12.2025 16:48
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A gentle reminder if you've received an invoice from a Freelancer/Self employed person which is due before Christmas.
Be a love, and pay it today.
19.12.2025 09:46
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Bronze plaque saying "A Letter to the Future. Ok is the first Icelandic glacier to lose its status as a glacier. In the next 200 years all our glaciers are expected to follow the same path. This monument is to acknowledge that we know what is happening and what needs to be done. Only you know if we did it. August 2019. 415ppm CO2"
TIL about a memorial ceremony in Iceland in 2019 to mark the end of a glacier, changing the place name from OkjΓΆkull to Ok (jΓΆkull = glacier). Uncompromising wording on the bronze plaque:
"This is to acknowledge that we know what is happening and what needs to be done. Only you know if we did it".
07.12.2025 17:17
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Part of our 2025 Advent Calendar, a black and white line drawing showing my version of Bigfoots wearing wintery clothes and bearing various wrapped Christmas presents.
Every year we make a free-to-download-and-print-off-yourself colouring-in Advent Calendar. This yearβs heavily features Bigfoots. Please share!
Download it for free here⦠www.worldofmoose.com/pages/2025-b...
29.11.2025 13:41
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How Bad Will It Get?
An honest answer.
Many of us just want to know how bad it's going to get over the next 10 or 20 years. We want the grim details, without any sugar coating. We're mature enough to handle it. We're not little kids who need bedtime stories.
www.the-sentinel-intelligence.net/how-bad-will...
29.10.2025 18:22
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Immune dysregulation lasting 9-12 months following infectionβand people without mitigations getting Covid at least once a year.
So, an acquired immune deficiencyβbut on a subscription plan.
But donβt worry, it deducts from your Immunity Card when itβs time for renewal.
20.10.2025 09:41
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Apparently masks are too hard but immune dysfunction is a-OK for folks
15.10.2025 23:48
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The far-right is in its pomp. We will have to fight for our values like never before.
iandunt.substack.com/p/encounteri...
14.09.2025 12:33
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08.09.2025 08:25
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29.07.2025 16:25
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24.07.2025 14:31
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"Clowns to the left of me, jokers to the right. Here I am!"
02.06.2025 14:25
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Please can we have a bluesky π of reposts. Last day to try to get 3,000 signatures to help keep everyone safer in healthcare. Especially Cancer patients and elderly. Please sign our petition below π
10.05.2025 16:41
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Quote from Dr. David Putrino, long Covid researcher at Mount Sinai: "there is no such thing as a covid infection without consequence"
Because some people clearly haven't got the memo
28.03.2025 15:31
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Two months ago I downloaded an app called Streaks that lets me track a few daily & weekly work tasks and I have never thought I was someone who was motivated by keeping up streaks for habit-building but I guess I am learning new things about my brain because I have not let a single one of them drop
24.03.2025 16:26
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Deepest dive of a narwhal.
1814 Meters deep. Narwhals dive to this depth up to 15 times a day in search for food.
This is a tremendous website, I highly recommend a scroll.
The Deep Sea
Here's a fun fact from the site.
neal.fun/deep-sea/
16.03.2025 19:46
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Space Elevator
Take a trip to space!
Or if you want to go the other direction, he has this one too
16.03.2025 19:48
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The great thing about the arts is that it teaches you to think critically so you can do so many things. My spouse, like me, has a BFA in Visual Art. He became a software developer lol. As a parent, I want my kid to do anything that brings them joy and fulfillment in a hard and joyless world.
08.03.2025 17:17
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03.02.2025 14:59
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28.01.2025 11:05
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