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Edit: @ABScientist shared ccnse.ca/sites/default/files/F… !

hey Covid-Competent, well-informed folks! I have a favour to ask!

has anyone bookmarked a good reference for what % of SARS-CoV-2 cases are due to fomite transmission?

the US CDC was at one point saying:

each contact with a contaminated surface has less than a 1 in 10,000 chance of causing an infection [1]


but that's not a % of infections, it's per contact with contaminated surface. That's supported a few ways, eg. by a sampling that included counting touchpoints:

The estimated risk of infection from touching a contaminated surface was low (less than 5 in 10,000) by quantitative microbial risk assessment [2]


but that study didn't actually culture virus, they checked RNA levels and counted touches (and again, is per contaminated touch, not per case)

Try as I might, I can't actually find a grounded estimate of how many actual infections have been fomite-driven at any point in the SARS-CoV-2 pandemic.

[1] archive.cdc.gov/www_cdc_gov/co…
[2] pmc.ncbi.nlm.nih.gov/articles/…

@askazero

#SARSCoV2 #COVID #COVID19 #COVIDIsAirborne #CovidIsNotOver #CovidCompetent #AirborneAware

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in reply to N95Bias β“‹πŸ΄β€β˜ οΈ

@currentbias the only documented case of fomite SARS-CoV-2 transmission that I have heard of is pubmed.ncbi.nlm.nih.gov/327581…

Flipside, an upper bound on fomite transmission would be excellent, which doesn't require proving any actually happened

(Somewhere out there on Fedi someone might be thinking "well there's an upper bound of 100% of cases!" but that's not really helpful)

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in reply to datum (n=1)

@currentbias
There is no harm to regular handwashing, as it also prevents other infections. But regular handwashing should not be used as an argument to not wear a mask when sharing indoor air. And that's how it has been used.

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in reply to Another concerned scientist

@currentbias
" Results suggest that the contributions of fomite,
droplet, and inhalation transmission without any personal protection to overall risk are 6.9%, 32%, and
61% respectively. With personal protective equipment, the mean percent contributions of fomite,
droplet, and inhalation transmission are 2.8%, 30%, and 68% respectively.4"

ccnse.ca/sites/default/files/F…

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in reply to Another concerned scientist

@ABScientist @currentbias
Thank you! ccnse.ca/sites/default/files/F… is exactly what I hoped to find!

I have some doubts about their analysis - they have fomites as the only mode of transmission between two people who sat one behind the other (table 2 row 2) - but regardless this is exactly the analysis I sought.

And a couple of their citations are new to me too. Excellent!

Thank you thank you!

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in reply to datum (n=1)

@currentbias
I also have doubts about the study.

The one thing that it does indicate is that the balance may shift if you introduce other mitigations.

You have the same issue with estimating the effectiveness of vaccines: The picture is quite different if you add masks than if no one is using masks.

Masks reduce the viral load, which increases the chances that a trained immune system can clear the remaining virus.

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in reply to Another concerned scientist

@ABScientist @currentbias
Yep. Yesterday afternoon, I saw bottles of handwash and clear instructions to use them, but not a single mask. At the time, I was visiting the doctor's surgery. πŸ˜–

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:questionbox: :vflex: πŸ‡ΊπŸ‡Έ πŸ§‘β€βš–οΈ

Does anyone have recommendations for a USian called for jury duty if they're prevented from masking up?

@askazero @maskup

:BoostOK:

#MaskUp #CovidIsNotOver #StillMasking #CovidIsAirborne

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i havent gotten a mutual aid donation in almost two weeks. fuck these bots, i need rent, you know im real because my reputation precedes me.

$366/2500

venmo.com/u/rachaelspooky

#mutualaid #transcrowdfund



fedi meta, ranty, the things I wish I could say

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in reply to Hazelnoot

RE: fedi meta / drama, ranty, the things I wish I could say

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πŸ”— β€œI pretty much haven't worked since 2020”: How the effects of Long COVID have harmed professional musicians and DJs musicradar.com/music-industry/…

@pandemicene

#longCovid

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Since people have asked about it, I now have a Ko-fi page where you can donate to help pay my bills or subscribe to support my fediverse work. No one should feel pressured or obligated to contribute, but it will certainly be appreciated! πŸ’™


β€œOne thing that can make a significant difference in reducing illness is masking,”

β€œWhile it received mixed reactions...one of the greatest missed opportunities in public health...has been acknowledging the effectiveness of masks at reducing spread of airborne illness.”


stuff.co.nz/nz-news/360735673/…

@maskup

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fedi PSA, spam, mutual aid scam

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πŸ‡¨πŸ‡¦ CSA Z94.4:25 -- Selection, use, and care of respirators, draft review (comments open June 20, 2025 - Aug 19, 2025)

This Standard sets out requirements for the selection, use, and care of respirators and for the administration of an effective respiratory protection program in the workplace.


publicreview.csa.ca/Home/Detai…

@maskup

:xplore1900: :aura: :n95:

#CovidIsAirborne

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in reply to trendless πŸ‡¨πŸ‡¦

Might be some of the best news we've had in a long long time... Hope it survives.πŸ₯³

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$[x2 We've just released version 2025.4.3 of Sharkey! [size=small](warning: long)[/size]]

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πŸ”— Respirator Types and Use cdc.gov/niosh/ppe/respirators/

@maskup

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please boost as it is semi-important

So I want to change my legal name and gender this year; I first want to do the changes in the Netherlands as it's easier for me for various reasons, but that also means carrying over the changes to the Polish side as I am still a citizen of that country.

However moving over the changes also means adjusting my last name to make the ending match my new legal gender (as yes. plenty of last names are gendered. it's stupid.) - and I don't know how the Dutch side will handle that change?

Is there any procedure for such a small change in the BRP? There's little available information for that, and it pisses me off that despite the amount of Polish (and Slavic in general) migrants in this country the civic servants are still ignorant to how our last names work... :blobcatfacepalm:

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fediblock, zoophilia

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πŸ”— Decreases in chimpanzee respiratory disease signs and enteric viral quantity following implementation of anthroponotic disease prevention protocols at a long-term research site sciencedirect.com/science/arti…

Following a fatal outbreak of anthroponotic respiratory disease among chimpanzees at the long-term field site of Ngogo, Kibale National Park, Uganda, research personnel implemented more stringent disease prevention protocols (e.g., use of face masks in the presence of chimpanzees). Furthermore, in response to the COVID-19 pandemic, a 7-day quarantine period prior to any exposure to chimpanzees was implemented for all Ngogo research personnel.

Chimpanzees were observed to cough less frequently following the implementation of more stringent disease prevention protocols compared to the period prior. Coughing frequencies were even lower following the implementation of the quarantine period.


@maskup

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πŸ”— Measurements of Surrogate Respiratory Sessile Droplet pH and Implications for Exhaled Respiratory Aerosol and Airborne Disease Transmission pubs.acs.org/doi/full/10.1021/…

@maskup

#CovidIsAirborne

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please boost, moderation meta/drama, on minors being "owned" by others (kink relationships)

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URGENT fediblock, immediate full suspension, MAPS/CSAM

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πŸ”— Minimal Influenza Virus Transmission From Touching Contaminated Floors and Metal Door Levers: Laboratory Study II onlinelibrary.wiley.com/doi/10…

In our previous paper, we demonstrated through a series of experiments that the probability of influenza virus transmission from touching contaminated surfaces of face masks is minimal (Sci Rep 2024, 14, 20211). In the present study, we expanded upon this study by conducting an experimental evaluation of the likelihood of influenza transmission from dried fomites under three specific scenarios... We found that viable viruses were rarely transmitted to fingertips from the above fomites even when the viral loads in the viral fluid contaminating the fomites far exceeded that seen in real life. Consequently, we conclude that the probability of contact transmission of influenza via dried fomites is negligible or minimal under the scenarios studied here.


@maskup

#CovidIsAirborne

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in reply to trendless πŸ‡¨πŸ‡¦

That's good news, because cleaning groceries is a pain (every tried to wipe off a loaf of bread?).

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in reply to Another concerned scientist

@ABScientist Though I expect one should make a distinction between "on the groceries" and "in the groceries".

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πŸ”— Here’s an Inconvenient Truth: Disease Is in the Air thetyee.ca/Culture/2025/05/16/…

We ignored the science of airborne transmission for a century. Carl Zimmer tells us why.


@maskup

#CovidIsAirborne

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in reply to trendless πŸ‡¨πŸ‡¦

1905 aerosol / droplet experiment U.K. parliament

What were the historical reasons for the resistance to recognizing airborne transmission during the COVID-19 pandemic?

doi.org/10.1111/ina.13070

Estimating the population-level effects of nonpharmaceutical interventions when transmission rates of COVID-19 vary by orders of magnitude from one contact to another

openread.academy/paper/reading…

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Block Recomendation (codeofamor.net), harassment

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Hey there @zeroes people! What's the best resources these days for how to put on a Covid-competent event? What's the best resources for why to make an event Covid-competent? #CovidIsNotOver #covid #WearAMask


Why are you taking sarscov2/covid seriously when others like you didn't?

(presumably there are a number of discrete subtypes of people like you and for which there may be many distinct 'whys'; feel free to share any/all of them)

#CovidIsNotOver

@pandemicene @askazero

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reshared this

in reply to trendless πŸ‡¨πŸ‡¦

I guess my first reply was flippant. If these conditions hadn't occurred I might be among the majority/nonzeroes:

  • in 2020, had immune compromised people in my life
  • general attitude of "question everything"
  • had the time, energy, desire, capability to spend hours a day reading abstracts and papers
  • so I did
    • read intelligent analysis and expert notes early on (slatestarcodex.com/ comes to mind from ~January 2020) who correctly laid out possibilities
    • read studies and experts early on who presented unequivocal airborne nature (March or April 2020 I think)


  • recognized based on the above that Public Health was NOT following the evidence; pushed back without effect, but this made clear that public messaging was not trustworthy (again, in 2020!)
  • know people who have been terribly hurt by the pandemic
  • kept reading and the evidence has piled up and up and up

reshared this

in reply to trendless πŸ‡¨πŸ‡¦

Self-employed with Epstein-Barr floating dormant in my bloodstream. Yeah, no.

That said, I know people with severe asthma who stopped masking b/c peer pressure. "Oh you still mask? I should too."

@pandemicene @askazero

reshared this



@askazero this person xoxo.zone/@Ashedryden/11430889… seeks advice for reducing risk when hosing an indoor event

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πŸ”— Indoor Air Pollution: Understanding Harmful Substances in the Indoor Air air-fanta.com/blogs/all/unders…

@maskup

#CovidIsAirborne

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πŸ”— NorthBox 6XL review β€” the only PC fan air purifier made in Canada
An excellent PC fan-powered air purifier developed by North Box Systems, a father and son company based in Ontario housefresh.com/northbox-6xl-re…

@maskup

#CovidIsNotOver #CovidIsAirborne

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goodmenproject.com/featured-co…

Respirators are so effective that United Kingdom research has indicated their use by the public would have dropped the rate of COVID transmission by an estimated factor of 9, compared with 0.6 for surgical masks. A factor of 9 is enough to put SARS-COV-2 into exponential decay, meaning the virus would have been highly suppressed for as long as respirator use continued. The exponential math of viral spread also means that perfect masking compliance would not have been required to achieve suppression.


@maskup :xplore1900:

#CovidIsAirborne #WearARespirator

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in reply to trendless πŸ‡¨πŸ‡¦

Yes-but-my-sovereign-rights-etc 🀑🀑🀑🀑🀑🀑🀑🀑🀑

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@violetblue heya! In the recent COVID newsletter, you wrote, β€œβ€¦ I don’t see anyone covering the public health developments as a whole picture, rather than fragments.”

There is β€œHealth Security Decoded” by the Johns Hopkins Center for Health Security: centerforhealthsecurity.org/ou…

Apologies if this came from you, and my inbox and I both forgot; felicitations if this is new and useful! You’re the fuckin’ best, keep on keeping on

@pandemicene #CovidIsNotOver

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πŸ”— Why Masks-Required Concerts Still Sell Out in the Bay Area

β€œI think most non-COVID-cautious musicians think about COVID precautions only being for the sake of disabled and immunocompromised folks, and don’t realize that these are real issues that the musicians themselves can be impacted by and are all at risk for.”


@pandemicene

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in reply to trendless πŸ‡¨πŸ‡¦

It's a mystery...

"Why Masks-Required Concerts Still Sell Out in the Bay Area"

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"Respirator" means a facemask that seals around the mouth and nose for the purpose of filtering all the air the wearer inhales.

Respirators can be constructed of either:

a) an elastomeric body designed to be reused many times with replaceable electrostatically-charged, glass fibre, charcoal and/or gas filters, straps, etc

b) an electrostatically-charged fabric designed to be disposed of after one or a small number of uses.

Most reusable elastomeric respirators (N95, FFP2, FFP3, P100) have exhalation valves, but some don't.

Most disposable fabric respirators (KN95, KF94, N95, FFP2, FFP3) don't have exhalation valves, but some do.

🧡

@maskup

#MaskUp #MaskMeansRespirator #WearARespirator #N95 #P100 #Respie #Elasto #CovidIsAirborne

This entry was edited (4 months ago)

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in reply to trendless πŸ‡¨πŸ‡¦

Humans are such ridiculous thinkers. I remember learning about Jon Snow near the beginning of the pandemic. He proved cholera was being spread through contaminated water, and he was fighting to convince the "miasma" thinkers.

And I was just like... fellas... has nobody considered that it could be... BOTH? That it might vary by the particular disease? Or even that one disease could have multiple forms of transmission? Why does your pet theory have to be the ONE TRUE theory?

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πŸ”— Stanford must end its complicity in COVID harms

It’s unconscionable that Stanford School of Medicine and the Freeman Spogli Institute hosted a conference in October led by architects of the disablement of 100 million people and the preventable deaths of tens of millions more. It’s even worse that University President Jonathan Levin lent institutional support by volunteering to make the opening remarks. It’s worse yet that the apparent success of this conference may have influenced President Donald Trump to tap at least two conference participants for top health posts.


@pandemicene

#CovidIsNotOver

This entry was edited (4 months ago)

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in reply to trendless πŸ‡¨πŸ‡¦

what an incredible display of maturity and restraint for a college newspaper op-ed discussing a gore-flecked nightmare conference of vultures and hyenas and dung beetles.

It’s a feat to experience disability and still have this article inside you five years on. Elite academia voice is a trip in an internet of polemics.

and furthermore, lmao at the perhaps unintended pun in β€œbeing fΓͺted at Stanford.” Blessed is Nurgle’s garden.

#CovidIsNotOver

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πŸ”— Developing chlorine-based antiseptic by electrolysis pubmed.ncbi.nlm.nih.gov/319055…

> This paper examined the possibility of using hypochlorite water as a chlorine-based antiseptic for handwashing in public buildings and healthcare facilities. The electrolysis method was used, which produces Hypochlorous acid (HOCl) from mixing drinking water with small amounts of sodium hydroxide. Hypochlorous acid is usually produced by blood cells to surround pathogens when the skin is cut and exposed to pathogens. The methods used were based on hydrolysing drinking water at a different salt concentration (from 0 up to saline water 0.9% NaCl) under the different power supply. The results showed that 0.005-0.01% hydrochloride water can be a perfect antiseptic that can kill most bacteria and pathogenies within 12 s. In one prototype set up one liter of the prepared solution needed the only 2 g of NaCl, 12 V and 3 amps' power. However, the pH value should be maintained to be around 5-6. The results also showed that the most efficient way was to produce the solution on-site. However, if stored properly it can be used for 7-10 days after production.

@pandemicene

#HOCl #HOCLowerCaseL

This entry was edited (5 months ago)

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in reply to trendless πŸ‡¨πŸ‡¦

I make HOCL a couple of times a week at home (~250-300ppm) and use it for everything including spraying in public washrooms, sanitizing masks, washing produce, cleaning and sanitizing bathrooms, toothbrushes, cat litter boxes, counters, work surfaces. So cheap, too - Β½tsp salt and water with ΒΎtsp white vinegar makes 750ml.

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πŸ”— The Long COVID Game helloworlds.ca/the-long-covid-…

> This short (<5min) instructional game can help illustrate the risks of repeated COVID infections and the chance of acquiring Long COVID. It was designed for large groups, such as a classroom of students. The goal is to communicate the benefits of wearing a respirator, such as an N95, to reduce the number of COVID infections and thus the risk of contracting Long COVID.

@pandemicene

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#PlusLife folks: is there a specific point in the cycle when power draw is maxed out (and/or >2.4a)?

@askazero

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in reply to trendless πŸ‡¨πŸ‡¦

I suspect that maximum power draw is when the device is activating the heating (it needs to heat up to ~60 degrees celsius internally).

After switching it on (while blinking red), it needs to go up from 20 to 60, so there is some continuous heating. After that, I guess it will pulse the heater to stay at 60.

I didn't measure that, just educated guessing.

Ask A Zero reshared this.



to re-up -- about masking and protection against gaseous chemicals which are deleterious to your airways/lungs, such as might be contained in wildfire smoke πŸ‘‡

zeroes.ca/@trendless/113227130…

@maskup

#LAFires #LAFires2025 #California #Wildfire #Wildfires #MaskUp #N95 #P100 #OV


To everyone wearing masks as protection against chemicals from the plant on fire in Conyers, GA [edit: or the wildfires in CA]:

Gases permeate particulate filtration. Use organic vapour / charcoal filters or full-on [chlorine] gas cartridges to keep it out of your respiratory system.

Masks work -- but they have to be the right kind of mask.

πŸ”— ctvnews.ca/mobile/world/more-t…

@maskup

#MaskUp #P100


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in reply to trendless πŸ‡¨πŸ‡¦

This post contains a 3M cheatsheet with most of the filters they offer, what they're designed to filter, and their part numbers: zeroes.ca/@trendless/112215285…

Some of these filters and the elastomeric [reusable] respirators on which they fit can be found at hardware and industrial supply stores.

@maskup

This entry was edited (6 months ago)

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πŸ”— β€œI’ve Never Felt So Confused”: A Mixed-Method Study of Managing Family-to-Work Conflict During the Tripledemic link.springer.com/article/10.1…

> This mixed-methods study incorporates online survey data from the January 2023 Alberta Viewpoint Survey (N = 1196) and interview data collected from May-August 2023 (N = 23) to study the strategies families and caregivers used during the tripledemic to manage FWC in a time of high uncertainty.

> Caregiving struggles were exacerbated during the fall of 2022 with the circulation of RSV, influenza, and COVID-19

> This mixed-methods study highlights the strategies families and caregivers used during the tripledemic to manage family-to-work conflict (FWC) in a time of high uncertainty

> Parents, especially mothers, were most likely to miss work for extended periods, leading to a greater potential for FWC among these groups

> Caregivers who were able to take advantage of workplace, relationship, and network resources were better able to limit FWC during these uncertain times

@pandemicene

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