Jose-Luis Jimenez's Avatar

Jose-Luis Jimenez

@jljcolorado

Dist. Prof. Chem. & CIRES, Univ. Colorado. #HighlyCited2022, Fellow AAAR & AGU. http://Bit.ly/TenSR http://Bit.ly/ATRVs Aerosols, pollution #EndFossilFuels #COVIDisAirborne. Views are my own

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07.08.2023
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Latest posts by Jose-Luis Jimenez @jljcolorado

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Amid Confusing CDC Guidance About Vaccines, Study Highlights New Risk of COVID-19 During Pregnancy A Harvard study found that the children of women who contracted COVID-19 while pregnant may be at an increased risk for autism and other diagnoses, raising new concerns about the CDC’s decision to sto...

'What surprised them was that 16.3% of those babies received a neurodevelopmental diagnosis by three years, compared with 9.7% of the babies who were not exposed to COVID-19 in utero'.

www.propublica.org/article/covi...

29.11.2025 20:13 πŸ‘ 224 πŸ” 113 πŸ’¬ 9 πŸ“Œ 4
black background, swirly abstract circles, Clarivate and CIRES logo

black background, swirly abstract circles, Clarivate and CIRES logo

Three CIRES researchers are listed as 2025 Clarivate "Highly Cited Researchers 2025." The annual list celebrates researchers with significant and broad influence: Jennifer Balch, Noah Fierer, and Jose Jimenez! @cu-esiil.bsky.social @clarivate.com @noahfierer.bsky.social @jljcolorado.bsky.social

13.11.2025 21:45 πŸ‘ 11 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
Announcement with blue background, white letters, images of a mountain, bird, and flower.

Announcement with blue background, white letters, images of a mountain, bird, and flower.

PhD candidate @colorado.edu Rebecca Mesburis is going to give a Town Talk in #Nederland on Thursday. The town of Ned had a devastating fire recently in their town shopping center. Support #Ned and learn about mitigating indoor air quality impacts from #smoke! @jljcolorado.bsky.social

20.10.2025 21:33 πŸ‘ 6 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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Mitigation of Indoor Air Pollution from Air Cleaners Using a Catalyst The COVID-19 pandemic highlighted the importance of indoor air quality and the role of airborne transmission in the disease spread. Heightened public awareness led to an increase in the commercializat...

Also see the great study by Mesburis et al. (@jljcolorado.bsky.social and @gouwlab.bsky.social), which used some different approaches but arrived at the same conclusions. Air cleaners (legit ones) work, and enable other technologies (like GUV) to be used more safely.
pubs.acs.org/doi/10.1021/...

29.08.2025 12:58 πŸ‘ 16 πŸ” 3 πŸ’¬ 1 πŸ“Œ 1
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E.P.A. Is Said to Draft a Plan to End Its Ability to Fight Climate Change

NYT: The Trump administration has drafted a plan to repeal a fundamental scientific finding that gives the United States government its authority to regulate greenhouse-gas emissions and fight climate change, according to two people familiar with the plan.

23.07.2025 03:43 πŸ‘ 1172 πŸ” 470 πŸ’¬ 124 πŸ“Œ 57
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TU Graz Study: Austria’s Schools Largely Fail to Comply with National and European Air Quality Guidelines In three quarters of all Austrian classrooms, the average CO2 concentration exceeds the guideline value. Inadequate air quality impairs learning and increases the risk of infection and health issues.

www.tugraz.at/en/tu-graz/s...

28.05.2025 20:59 πŸ‘ 15 πŸ” 7 πŸ’¬ 2 πŸ“Œ 1

The article claiming that SARS-CoV-2 remains infectious in the air for 16 hours has been making the rounds on social media again.

I thought I would take this opportunity to discuss it, what it shows, what it doesn’t, and why I think it shouldn’t be taken seriously.

A thread.

25.05.2025 18:58 πŸ‘ 200 πŸ” 59 πŸ’¬ 12 πŸ“Œ 10
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A victory for the federal scientific workforce! We could not stand by while this irreparable harm continues at NSF, NOAA and all our scientific agencies.

TODAY the judge granted our request to temporarily HALT the mass firings at federal agencies under Trump’s Executive Order.

10.05.2025 02:03 πŸ‘ 934 πŸ” 316 πŸ’¬ 9 πŸ“Œ 29

There is no need for this suffering.
The solutions are here, work well, way cheaper in the long term and magnitude better for our wellbeing.
-Electrify all homes including rentals and social housing.
-Ban gas connection to new homes.
-Plan the end of the residential gas network

10.05.2025 00:38 πŸ‘ 34 πŸ” 15 πŸ’¬ 3 πŸ“Œ 0
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Nice: 49% strongly oppose withholding funds from universities, 23% strongly support www.nytimes.com/interactive/...

25.04.2025 20:42 πŸ‘ 72 πŸ” 20 πŸ’¬ 3 πŸ“Œ 6
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A new article estimates that even a 10% DECLINE in MMR vax coverage in the US could lead to 11 MILLION US measles cases over 25 years.

IF instead MMR coverage INCREASES by 5%, cases would falled to <10K.

Given infectiousness of Measlies, it's VITAL to ⬆️ MMR vax rates.

Measles info below 1/2

25.04.2025 13:37 πŸ‘ 403 πŸ” 164 πŸ’¬ 6 πŸ“Œ 9

Last month, the CDC Division of Viral Hepatitis found the source of a Hepatitis C outbreak in Florida that state officials had been unable to solve since December. Now the entire Division has been fired, leaving investigations of outbreaks in OR, PA, MA, NM, WI, WV and GA, unsolved in addition to FL

17.04.2025 00:59 πŸ‘ 288 πŸ” 126 πŸ’¬ 9 πŸ“Œ 9
A powerful ocean scene shows waves crashing against a row of buildings under a dark, stormy sky. Overlaid in bold white text: β€œHow much would you pay to protect your coast?”

A powerful ocean scene shows waves crashing against a row of buildings under a dark, stormy sky. Overlaid in bold white text: β€œHow much would you pay to protect your coast?”

A square graphic with an aerial view of swirling ocean currents in teal and blue. Bold white text reads: β€œOnly $21/year from the average taxpayer helps fund NOAA.”

A square graphic with an aerial view of swirling ocean currents in teal and blue. Bold white text reads: β€œOnly $21/year from the average taxpayer helps fund NOAA.”

A square infographic with a dark stormy ocean background. The white header text reads: β€œYour $21 funds these essential services.” Below are six dark blue boxes, each with a white icon and label:
	1.	Coastal Mapping – Detailed charts of shorelines, navigation hazards, and more
	2.	Weather Monitoring – Vital data for tracking storms, extreme heat, and drought
	3.	Marine Resource Management – Conservation of ocean life and sustainable fisheries
	4.	Coastal Resilience – Infrastructure that withstands storms and rising seas
	5.	Storm Research – Studies of severe weather patterns and impacts

The graphic uses clean lines, oceanic tones, and emphasizes the small taxpayer cost for these vital environmental services.

A square infographic with a dark stormy ocean background. The white header text reads: β€œYour $21 funds these essential services.” Below are six dark blue boxes, each with a white icon and label: 1. Coastal Mapping – Detailed charts of shorelines, navigation hazards, and more 2. Weather Monitoring – Vital data for tracking storms, extreme heat, and drought 3. Marine Resource Management – Conservation of ocean life and sustainable fisheries 4. Coastal Resilience – Infrastructure that withstands storms and rising seas 5. Storm Research – Studies of severe weather patterns and impacts The graphic uses clean lines, oceanic tones, and emphasizes the small taxpayer cost for these vital environmental services.

Last one for Tax Day – NOAA 🌊

The average U.S. taxpayer contributes $21/year to the National Oceanic and Atmospheric Administration.

πŸ’‘ NOAA turns science into safety β€” for coasts, communities, & the climate. It helps safeguard lives, property, and ecosystems from rising seas and extreme weather.

16.04.2025 00:54 πŸ‘ 5432 πŸ” 1600 πŸ’¬ 127 πŸ“Œ 68
CAUT advises academics against non-essential travel to the U.S. Given the rapidly evolving political landscape in the United States and reports of individuals encou

Canadian academics warned against travel to the US

"Given the rapidly evolving political landscape and reports of individuals encountering difficulties crossing the border, CAUT strongly recommends that academic staff travel to the US only if essential and necessary"

www.caut.ca/latest/2025/...

16.04.2025 02:53 πŸ‘ 55 πŸ” 15 πŸ’¬ 2 πŸ“Œ 1
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Trump officials quietly move to reverse bans on toxic β€˜forever chemicals’ EPA bids to change chemical risk evaluations, which could expose public to higher levels of PFAS and other pollutants

The Trump administration is quietly carrying out a plan that aims to kill hundreds of bans on highly toxic β€œforever chemicals” and other dangerous compounds in consumer goods

www.theguardian.com/environment/...

12.04.2025 19:42 πŸ‘ 15 πŸ” 16 πŸ’¬ 0 πŸ“Œ 1
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Opinion | What Is Actually the Point of Treating the N.I.H. Like This? (Gift Article) Efficiency is not being enhanced, nor is waste being eliminated at the N.I.H. Scientists are just left to wonder: Why?

A good article explaining the senseless destuction of one of the US's most critical research institutions www.nytimes.com/2025/04/11/o...

12.04.2025 05:30 πŸ‘ 555 πŸ” 201 πŸ’¬ 20 πŸ“Œ 11
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Fossil fuels generate less than half of US electricity for first month ever, says energy think tank Fossil fuels accounted for less than 50% of the U.S. power mix for the first month on record in March, according to energy think tank Ember on Friday, driven by a near-quarter rise in wind and solar power generation.

Some good news. Let’s accelerate this!

www.reuters.com/business/ene...

07.04.2025 14:33 πŸ‘ 370 πŸ” 118 πŸ’¬ 3 πŸ“Œ 5
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Human source SARS-CoV-2 aerosol transmission to remote sentinel hamsters AbstractBackground. Bioaerosol-mediated transmission of COVID-19 via building ventilation systems has yet to be convincingly demonstrated. We used the Sout

Very pleased to see this from the UK PROTECT study published. There’s still gaps on translation to humans, infectious dose etc, but it adds further evidence that covid can transmit by airborne routes academic.oup.com/ofid/advance...

06.04.2025 12:06 πŸ‘ 36 πŸ” 14 πŸ’¬ 2 πŸ“Œ 1
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Facts and myths about measles It seems ironic that Robert F Kennedy Jr, one of the most prominent antivaccine activists, has been made Secretary of Health and Human Services in the USA while one of the largest recent measles outbr...

πŸ“ƒ Facts and myths about #measles

β€œMeasles is a β€˜canary in the coalmine’ for under-vaccination [...] knowing the facts about measles information and disinformation is key.”

Read and share the @thelancetinfdis.bsky.social’s April Editorial ➑️ hubs.ly/Q03g26gH0

06.04.2025 10:39 πŸ‘ 123 πŸ” 50 πŸ’¬ 4 πŸ“Œ 4
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A Second Child Dies of Measles in Texas It is the second confirmed measles death in the U.S. in a decade. If the outbreak continues at the current pace, the nation may lose its β€œelimination” status.

A second child has died in the current US measles outbreak: An entirely avoidable tragedy and one more sign that this outbreak is probably much larger than reported numbers suggest and not going anywhere soon...
#IDsky πŸ§ͺ

06.04.2025 13:27 πŸ‘ 171 πŸ” 67 πŸ’¬ 7 πŸ“Œ 1
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Climate crisis on track to destroy capitalism, warns top insurer Action urgently needed to save the conditions under which markets – and civilisation itself – can operate, says senior Allianz figure

Climate crisis on track to destroy capitalism, warns top insurer

"Action urgently needed to save the conditions under which markets – and civilisation itself – can operate, says senior Allianz figure"

www.theguardian.com/environment/...

06.04.2025 01:21 πŸ‘ 24 πŸ” 10 πŸ’¬ 0 πŸ“Œ 1
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7/6
We've added a page to the guide to point out further resources: those of @ukhadds.bsky.social , Andre Henriques & Al, and the World Health Organization. Our guide can be downloaded from letsair.org#mediation

05.04.2025 10:42 πŸ‘ 9 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
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NEW | Fossil fuels fall below 50% of US electricity for the first month on record πŸ‡ΊπŸ‡Έ

Among all the turmoil, some positive news from the latest @ember-energy.org data for March 2025:

πŸ†β†˜οΈ The share of fossil fuels fell to a record low of 49.2%

πŸ†β†—οΈ Wind and solar power hit a new record high of 24.4%

04.04.2025 15:05 πŸ‘ 949 πŸ” 220 πŸ’¬ 17 πŸ“Œ 20

Avoid, likely to create air pollution

31.03.2025 15:47 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Trump's attacks on universities get ever darker, with the shadows reaching our shores The US has become a hostile and authoritarian state to foreign scientists and is choosing ideology over science.

Colleagues are cancelling their US work trips. I worry that international colleagues in the US are at risk if they collaborate with us on certain topics.

I've written a new post about the increasing danger of being a foreign scientist in the US.

christinapagel.substack.com/p/trumps-att...

28.03.2025 19:36 πŸ‘ 1444 πŸ” 567 πŸ’¬ 32 πŸ“Œ 23
EPA Solidarity | Linktree Clean water and clean air are human rights. Join the fight. Stand with the EPA.

EPA Solidarity walks are happening TOMORROW, May 25th in cities across the United States! β˜€οΈπŸŒŽπŸ’§

Check out the link below to learn more, join a walk, or find more information about how to advocate for the EPA. Clean water and air are human rights.

linktr.ee/EPAsolidarity

#scienceforall

24.03.2025 15:32 πŸ‘ 310 πŸ” 102 πŸ’¬ 19 πŸ“Œ 9
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African leaders take stock of health cuts, chart path forward

β€œThe head of the Africa Centres for Disease Control and Prevention said a sharp drop in outside funding, spurred by a broad shutdown in most foreign aid by the Trump administration, will lead to two million to four million more deaths each year” www.cidrap.umn.edu/mpox/african...

21.03.2025 00:14 πŸ‘ 126 πŸ” 76 πŸ’¬ 2 πŸ“Œ 3
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RFK Jr.’s Prescription for Bird Flu on Farms: Let It Spread (Gift Article) The health secretary has suggested allowing the virus to spread, so as to identify birds that may be immune. Such an experiment would be disastrous, scientists say.

The Great Barrington Declaration, but for chickens.

RFK Jr. is truly the stupidest motherfucker.

18.03.2025 19:41 πŸ‘ 1954 πŸ” 471 πŸ’¬ 117 πŸ“Œ 127
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Scientists Say NIH Officials Told Them To Scrub mRNA References on Grants - KFF Health News Two senior scientists say National Institutes of Health officials advised them to remove references to mRNA vaccines in grant applications, and they fear the Trump administration will abandon a promis...

mRNA is at the forefront of cancer research, as well as vaccines

National Institutes of Health officials have now told scientists to remove all references to mRNA vaccines from their grant applications.

This means that all research in the field will be stopped and abandoned.

17.03.2025 02:21 πŸ‘ 881 πŸ” 460 πŸ’¬ 69 πŸ“Œ 64
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Newborn babies exposed to measles in Texas hospital Infants barely three days old are receiving antibody injections to help protect against the virus. Nearly 300 cases have been reported in the outbreak.

"Hospital staff are scrambling with damage control efforts implementing emergency masking policies and giving babies as young as 3 days old injections of immunoglobulin, an antibody that helps their fragile immune system try to fight off #measles."
www.nbcnews.com/health/healt...

15.03.2025 03:10 πŸ‘ 5357 πŸ” 2813 πŸ’¬ 457 πŸ“Œ 472