iiinova — where your digital self keeps evolving

Al Haddrell @ukhadds.bsky.social · 30/08/2026

Getting ready to see the latest in aerosol science (with @hairyaerosol.bsky.social)! Gonna be a good week in Xi’An, China. #IAC2026

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Al Haddrell @ukhadds.bsky.social · 09/08/2026

Far-UVC. What is it? How does it inactivate airborne pathogens? Will it give you sunburns? If not, why not? And if they work, why aren't they everywhere? In my latest explainer video I dive into all these questions and try to make some sense of it all. youtu.be/ujHMIdI2gLs

youtu.be

How Far-UVC "Safely" Inactivates Airborne Pathogens

YouTube video by Al Haddrell

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Al Haddrell @ukhadds.bsky.social · 09/08/2026

youtu.be

How Far-UVC "Safely" Inactivates Airborne Pathogens

YouTube video by Al Haddrell

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Al Haddrell @ukhadds.bsky.social · 23/06/2026

It’s been 10 years to the day since the Brexit vote. The sun is shining, where are all the Brexit parties and parades? I was told this was the UK’s “Independence Day”, what happened? Oh right, it was a total (and predictable) disaster.

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Al Haddrell @ukhadds.bsky.social · 23/06/2026

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Al Haddrell @ukhadds.bsky.social · 20/05/2026

While the virology in this article is interesting, there are fundamental issues in the underlying assuptions made by the authors. This research group believes that deep lung fluid is identical to Hanks Balanced Salt Solution. What this means is that the pH dynamics of the aerosol are incorrect.

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Al Haddrell @ukhadds.bsky.social · 07/04/2026

Over the past decade, vaping has become a popular alternative to smoking, with many teenagers picking it up. The thought being that vaping is less harmful, if harmful at all. The question is, are they? What happens when you vape? In my latest explainer video I dive into this.

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Al Haddrell @ukhadds.bsky.social · 07/04/2026

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Al Haddrell @ukhadds.bsky.social · 06/04/2026

These are the accounts that Elon promotes over on X. This is why the discourse on that app has gone down the tubes, he’s turned the place into the Mos Eisley Cantina.

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Al Haddrell @ukhadds.bsky.social · 29/03/2026

Airborne disease transmission doesn't just affect human populations. In collaboration with Herek Clack at the University of Michigan, my team has been funded $2M to study mechanisms of bird flu decay in the air, and to explore novel mitigation strategies. www.news-medical.net/news/2026032...

news-medical.net

Study explores airborne bird flu decay in livestock environments

Discovering how the bird flu virus degrades in the air around livestock and how engineering solutions can effect that degradation quickly and efficiently are core aims of a new University of Michigan ...

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Al Haddrell @ukhadds.bsky.social · 21/03/2026

Aerosols are very small, have a high surface to volume ratio and can readily reach super saturation. This combination makes them a unique environment for chemical reactions. We had a paper published in JACS that looked into the rate of chemical reactions within and on aerosols.

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Al Haddrell @ukhadds.bsky.social · 27/02/2026

I just wanted to give a shout out to @melunaka.bsky.social and thank them for making french subtitles (and fixing the english ones...) for my "SARS-CoV-2, CO2 and You" video! Looks great!

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Al Haddrell @ukhadds.bsky.social · 26/02/2026

Since measles is coming back, here's a question: What is the "half-life" of airborne decay of measles? Answer: We have no idea. People think it's long (1 to 2 hours). Why don't we know? Funders largely felt there wasn't a need to measure it since it was managed with vaccines.

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Al Haddrell @ukhadds.bsky.social · 26/02/2026

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Al Haddrell @ukhadds.bsky.social · 26/02/2026

Anyone who thinks A.I. is going to take everyone's jobs hasn't used A.I. to solve a technical problem.

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Al Haddrell @ukhadds.bsky.social · 26/02/2026

Anyone who thinks A.I. is going to take everyone's jobs hasn't used A.I. to solve a technical problem.

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Al Haddrell @ukhadds.bsky.social · 24/02/2026

The Clean Air for Kids explainer video has reached 1,000 views! Thank you to everyone who 'liked' and shared it, and especially those who have subscribed! This is the 5th video on my channel to pass the 1k mark, with 'SARS-CoV-2, CO2 and You' passing 4k views (randomly, on today as well).

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Al Haddrell @ukhadds.bsky.social · 24/02/2026

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Al Haddrell @ukhadds.bsky.social · 23/02/2026

I got this question that I thought some might find interesting. In short, why does the CO2 levels in a hockey arena trend upwards even though it has an upgraded HVAC?

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Al Haddrell @ukhadds.bsky.social · 23/02/2026

I got this question that I thought some might find interesting. In short, why does the CO2 levels in a hockey arena trend upwards even though it has an upgraded HVAC?

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Al Haddrell @ukhadds.bsky.social · 22/02/2026

This horrific. Tuskegee 2.0. Denying children healthcare ‘to see what happens’ is as unethical as it gets. How this happens: DOGE cuts -> experts leaving -> untrained ideologues hired -> unethical study on African children being approved. Gross.

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Al Haddrell @ukhadds.bsky.social · 22/02/2026

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Al Haddrell @ukhadds.bsky.social · 19/02/2026

It was a great honour to be part of the PERFORM team that was awarded the Royal Society of Chemistry 2025 Faraday Horizon Prize for advances in understanding the physicochemical properties of exhaled aerosol and their impact on the transmissibility of respiratory pathogens.

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Al Haddrell @ukhadds.bsky.social · 16/02/2026

CO2 monitors are great for estimating both air quality and the risk airborne disease transmission in a given space. A study just came out comparing the top of the line Aranet with a low cost alternative (Vitalight). Turns out they work just as well in typical environments.

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Al Haddrell @ukhadds.bsky.social · 10/02/2026

This is a great (and award winning) podcast! Please consider supporting it. Strong, independent journalism is needed now more than ever.

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Al Haddrell @ukhadds.bsky.social · 07/02/2026

The risk of the airborne transmission of disease correlates with the amount of infectious exhaled aerosol. Since people exhale CO2 with aerosol, its conc has been used as proxy for exhaled aerosol In this article, researchers propose a new way to estimate risk of transmission

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Al Haddrell @ukhadds.bsky.social · 07/02/2026

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Al Haddrell @ukhadds.bsky.social · 29/01/2026

How long a microbe remains viable in the air will depend on where it resides in/on an aerosol. So then, how do scientists figure out where? Answer: they use their understanding of the processes involved in industrial food production. Namely, coffee. youtu.be/HHwp4tLPK9M

youtu.be

Are Microbes on the Surface of Aerosol? aka: How instant coffee informs disease transmission

YouTube video by Al Haddrell

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Al Haddrell @ukhadds.bsky.social · 29/01/2026

youtu.be

Are Microbes on the Surface of Aerosol? aka: How instant coffee informs disease transmission

YouTube video by Al Haddrell

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Al Haddrell @ukhadds.bsky.social · 22/01/2026

Not so fun fact: Tear gas isn’t a “gas” If it’s not a gas, then what is it? Answer: it’s an aerosol. And this distinction matters. Let’s discuss 🧵

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Al Haddrell @ukhadds.bsky.social · 22/01/2026

Not so fun fact: Tear gas isn’t a “gas” If it’s not a gas, then what is it? Answer: it’s an aerosol. And this distinction matters. Let’s discuss 🧵

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Al Haddrell @ukhadds.bsky.social · 16/01/2026

Embarrassing. For everyone. Oof.

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Al Haddrell @ukhadds.bsky.social · 15/01/2026

This post has aged like a fine wine. No regrets. At this point, I doubt they’d let me in if I tried.

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Al Haddrell @ukhadds.bsky.social · 09/01/2026

One way guaranteed to avoid this nonsense is to NOT GO THERE.

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Al Haddrell @ukhadds.bsky.social · 29/12/2024

If you got a CO2 monitor for Christmas and are wondering what exactly the device is used for, I’ve put together a video to walk you through some ways you can use it improve your indoor air quality, and to lower your risk of catching airborne viruses (like Covid-19): youtu.be/WKgUZbB1Yao

youtu.be

SARS-CoV-2, CO2, and You

YouTube video by Al Haddrell

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Al Haddrell @ukhadds.bsky.social · 03/01/2026

Not all aerosol causes harm. Indeed, some are very useful at treating diseases of not only the lungs, but of other conditions as well In my latest explainer video, I introduce the topic of pharmaceutical aerosol. I discuss a bit of its history and some of the underlying advantages and disadvantages

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TorontoBikeMama @mamatoronto.bsky.social · 04/01/2026

❤️Open to all signatories❤️ Deadline Jan 12 Petition to adopt Health🇨🇦's new IAQ Guidance: bsky.app/profile/mama... No IAQ policy at any level of govt ensuring indoor air is clean & safe to breathe atm Clean air for kids & staff in schools & daycares shouldn’t be controversial 🙏✍️&share Thank you

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Dr Christine Peters @microlabdoc.bsky.social · 03/01/2026

It’s vital - and will become more so as we try to target AMR infections in the lung for example

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Al Haddrell @ukhadds.bsky.social · 03/01/2026

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Al Haddrell @ukhadds.bsky.social · 31/12/2025

Happy New Year! Let’s hope this one is better than the last…

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Al Haddrell @ukhadds.bsky.social · 23/12/2025

I suppose there is some comfort in knowing that the people they've put in charge have no idea what they are doing. That'll help limit the damage.

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TorontoBikeMama @mamatoronto.bsky.social · 23/12/2025

Clean air for kids & staff in schools & daycares shouldn’t be controversial No IAQ policy at any level of govt ensuring indoor air is clean & safe to breathe atm Petition to Toronto Board of Health to direct TO Public Health to adopt Health🇨🇦's new IAQ Guidance: bsky.app/profile/mama...

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Al Haddrell @ukhadds.bsky.social · 22/12/2025

Not sure who needs to see this. Some great advice from a beautiful story.

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Da(N95)iella [fka DaniAtomicus] @sharpflower.bsky.social · 21/12/2025

I spoke to the people who continue to shape their lives around avoiding [cholera/typhoid/dysentery] and only drinking ‘clean’ water

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Al Haddrell @ukhadds.bsky.social · 20/12/2025

One of the reasons why I go so hard on science misinformation/disinformation, is that as a working scientist it is frustrating to see your research misreported to push an agenda. For example, consider this piece of right-wing propaganda from The Telegraph that was just published

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