Mike McKillen
@mikemckillen.bsky.social
760 followers 1.1K following 640 posts
In flight from the tweet site. Also @mikemckillen@mastodon. Retired academic biochemist & safety specialist (bio-safety trainer to CL-3) #AndICycle #ClimateCrisis #DavosSafeAir #SeparateChurchState. If you use an alphanumeric handle I will block you!
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Reposted by Mike McKillen
brownecfm.bsky.social
1. I've had a surprising number of conversations about Covid-19 over the past week or so, all sparked by the fact that I was, as always, wearing an FFP2 respirator. People in healthcare facilities, taxi drivers, people on trains and buses.
Reposted by Mike McKillen
prakashlab.bsky.social
Life knows how to keep going - even if it’s freezing -15 degrees C 🥶 outside. AGU just covered our discovery of ultra resistant ice diatoms gliding into a world record! 🧪🔬Enjoy the story here:

eos.org/articles/ice...
Ice Diatoms Glide at Record-Low Temperatures - Eos
New observations reveal how microscopic organisms move through polar ice and illustrate how they may have evolved to thrive in extreme environments.
eos.org
Reposted by Mike McKillen
saraita101.bsky.social
These perspectives exist within ni and have more support than ppl think. I think we have to learn to live with each other, understand why believe this and understand why violence happened. Still difficult tho.Ppl who supported violence need to get why people vehemently disagree.
Reposted by Mike McKillen
dublincycling.bsky.social
Join us for our October public meeting!

We’ll be celebrating the many ways that cycling can help volunteers to get involved in their communities. All welcome!

📆 This Thursday Oct 9
⏰ 7.30pm
📍 Academy Plaza Hotel, 10-14 Findlater Pl, off O'Connell St. D01 X2X0

www.dublincycling.com/events/octob...
October public meeting: Celebrating pedal-powered volunteers
Join us for our October public meeting where we’ll be celebrating the many ways that cycling can help volunteers to get involved in their communities.
www.dublincycling.com
mikemckillen.bsky.social
Oh, not forggetting #SeatBeltSheriff!
mikemckillen.bsky.social
National #roadsafetyweek so one might expect messaging from RSA & @garda.ie to have some focus on driver behaviour with #ActiveTravel users, considering that 40 of us did not return home so far in 2025.
Today it's tyres. Seatbelts later. Child-seats soon.
#ZeroVision
tinyurl.com/4595hx8s
Irish Road Safety Week 2025
tinyurl.com
mikemckillen.bsky.social
Teachers & health care workers showing high rates of sickness leave.
mikemckillen.bsky.social
Where is public health? The data in the plot represents only those who were hospitalised as @hselive.bsky.social & CMO not interested in community prevalence, even though it remains a notifiable disease.
Besides Tess Finch-Lees why no health journos writing about it? #LongCOVID blighting lives.
mikemckillen.bsky.social
We have been in a steadily increasing wave of #COVID19 over the summer/autumn months as reported by @hspc.bsky.social respiratorydisease-hpscireland.hub.arcgis.com/pages/covid-19
Chart covers 26 May - 22 September.
Lots of folks in my circle ill with it (66% knew someone who had it recently).
Reposted by Mike McKillen
mikemckillen.bsky.social
about risks and precautions – like ventilation, HEPA filters, masking, isolating and vaccination."
Where is our public health? Is it fit for purpose?
mikemckillen.bsky.social
with hand sanitiser and Calpol as their only protections against the dangerous airborne disease."
"The studies cited here advise policy makers to conduct research, provide paediatric long-Covid clinics (none exist in Ireland) and monitor and prevent infections in children by educating the public
Reposted by Mike McKillen
brenttoderian.bsky.social
In cities, street space is a really scarce (and under-valued) commodity. Increasing vehicle size costs everyone.

And vehicle weight determines your impact on the wear-and-tear of cities.

So this kind of public policy is really just common sense.
taras-grescoe.com
On Sunday, #Zürich residents voted 52.8% in favor of increasing parking fees for cars according to weight.

The owner of a BMW X2 (Diesel), which weighs 1,675 kilograms, will now pay equivalent of €717 Euros per year to park on a public street. (Before, about €321.)

Direct democracy!
mikemckillen.bsky.social
air quality safe.
Needless to say I was wearing a respirator throughout the flight (FFP2), but no one else was masked.
@ukhadds.bsky.social @nousaerons.bsky.social
mikemckillen.bsky.social
The 2,700 ppm represents approximately 6% re-breathed air in the cabin.
In Irish health and safety law an employer has to ensure that the workplace air is safe according to statutory guidelines from our Health and Safety Authority: tinyurl.com/mtw9yksp
Airlines seem to be exempt from keeping cabin
Code of Practice for Indoor Air Quality
The Code of Practice is implemented through S.I. No. 255/2023 - Safety, Health and Welfare at Work (General Application) (Amendment) Regulations 2023.
tinyurl.com
mikemckillen.bsky.social
in #ireland and worldwide.
High CO₂ concentrations indicate the extent of re-breathed air.
The plot below shows how the carbon dioxide concentration varied during the flight (3h:30 min), with a peak value of c. 2,700 ppm, and a steady-state of c. 1,600 ppm for most of the journey.
Code of Practice for Indoor Air Quality
The Code of Practice is implemented through S.I. No. 255/2023 - Safety, Health and Welfare at Work (General Application) (Amendment) Regulations 2023.
tinyurl.com
mikemckillen.bsky.social
cabin using an Aranet portable detector.
Carbon dioxide levels are an accepted proxy measure for air quality (akin to the canary in a coal mine). A concentration >1,000 ppm is a cause for concern, particularly when we are in a period of increased infection incidence caused by #SARSCoV2
Code of Practice for Indoor Air Quality
The Code of Practice is implemented through S.I. No. 255/2023 - Safety, Health and Welfare at Work (General Application) (Amendment) Regulations 2023.
tinyurl.com
mikemckillen.bsky.social
I am concerned about the poor air quality apparent inside aeroplane cabins, which are after all workplaces (for cabin crew and pilots).
I was on a Ryanair flight ex-Bari (Puglia/Apulia) last Wednesday and as always, when I am on-board a plane, I monitor the carbon dioxide concentration in the
Code of Practice for Indoor Air Quality
The Code of Practice is implemented through S.I. No. 255/2023 - Safety, Health and Welfare at Work (General Application) (Amendment) Regulations 2023.
tinyurl.com
Reposted by Mike McKillen
dublincycling.bsky.social
Minister Canny’s U-turn on safer urban speeds risks lives and life-changing injuries. It cannot be let stand.

We were proud to visit the Dáil today at the invitation of Ciaran Ahern TD
to send the Minister our simple message: No delays. No excuses. Implement the law now.
mikemckillen.bsky.social
There’s a parallel with Bertie sending out Dermot Aherne "I've looked up every tree in North Dublin", but found no evidence or wrong doing by Ray Burke. In these river cases you need to know what chemical agent to look for. I hope EPA & anglers have kept fish for considered analysis in future.
Reposted by Mike McKillen