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Jose-Luis Jimenez

@jljcolorado.bsky.social
6.7K followers 76 following 48 posts

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

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Jose-Luis Jimenez @jljcolorado.bsky.social · 09/05/2026
Of course #hanta is most likely airborne But that doesn't matter. The key is that it is not very contagious. Tuberculosis is exclusively airborne. But we don't have a rapidly spreading pandemic where everybody gets infected in months. Hantavirus is much less contagious.
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Nora Bär @norabar.bsky.social · 08/05/2026
Excelente (como siempre) hilo de @jljcolorado.bsky.social sobre hantavirus: su transmisión y porqué no va a haber una pandemia👇
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Jose-Luis Jimenez @jljcolorado.bsky.social · 08/05/2026
(1) Veo el lio que se ha montado con el hantavirus en el crucero y queria decir algunas cosas. La mas importante: **Esto NO va a ser una pandemia** Estoy de acuerdo con @mvankerkhove.bsky.social e incluso con Fernando Simon. Y creo que nadie me puede acusar de estar siempre de acuerdo con ellos.
linkedin.com
External Redirection | LinkedIn
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Conor Browne @brownecfm.bsky.social · 29/11/2025
'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...
propublica.org
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...
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CIRES @cires.colorado.edu · 13/11/2025
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
black background, swirly abstract circles, Clarivate and CIRES logo
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CIRES @cires.colorado.edu · 20/10/2025
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
Announcement with blue background, white letters, images of a mountain, bird, and flower.
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Jesse Kroll @jessekroll.bsky.social · 29/08/2025
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/...
pubs.acs.org
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...
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MeidasTouch @meidastouch.com · 23/07/2025
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.
nytimes.com
E.P.A. Is Said to Draft a Plan to End Its Ability to Fight Climate Change
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Prof. Rob McLeod @robscot.bsky.social · 28/05/2025
www.tugraz.at/en/tu-graz/s...
tugraz.at
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.
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Al Haddrell @ukhadds.bsky.social · 25/05/2025
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.
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AGU (American Geophysical Union) @agu.org · 10/05/2025
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.
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Audrey Cetois 🇵🇸 @audreycetois.bsky.social · 10/05/2025
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
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Philip N Cohen @philipncohen.com · 25/04/2025
Nice: 49% strongly oppose withholding funds from universities, 23% strongly support www.nytimes.com/interactive/...
Text
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Prof Christina Pagel @chrischirp.bsky.social · 25/04/2025
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
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Ryan Marino, MD @ryanmarino.bsky.social · 17/04/2025
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
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Stand Up for Science! @standupforscience.net · 16/04/2025
Last one for Tax Day – NOAA 🌊 The average U.S. taxpayer contributes $21/year to the National Oceanic and Atmospheric Administration. 💡 NOAA turns science into safety — for coasts, communities, & the climate. It helps safeguard lives, property, and ecosystems from rising seas and extreme weather.
A powerful ocean scene shows waves crashing against a row of buildings under a dark, stormy sky. Overlaid in bold white text: “How 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: “Only $21/year from the average taxpayer helps fund NOAA.”A square infographic with a dark stormy ocean background. The white header text reads: “Your $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.
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Jose-Luis Jimenez @jljcolorado.bsky.social · 16/04/2025
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/...
caut.ca
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
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Joe Allen @joeallenjoe.bsky.social · 12/04/2025
The Trump administration is quietly carrying out a plan that aims to kill hundreds of bans on highly toxic “forever chemicals” and other dangerous compounds in consumer goods www.theguardian.com/environment/...
theguardian.com
Trump officials quietly move to reverse bans on toxic ‘forever chemicals’
EPA bids to change chemical risk evaluations, which could expose public to higher levels of PFAS and other pollutants
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@LaBonneLaB @labonnelab.bsky.social · 12/04/2025
A good article explaining the senseless destuction of one of the US's most critical research institutions www.nytimes.com/2025/04/11/o...
nytimes.com
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?
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Dr. Jonathan Foley @globalecoguy.bsky.social · 07/04/2025
Some good news. Let’s accelerate this! www.reuters.com/business/ene...
reuters.com
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.
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Prof Cath Noakes @cathnoakes.bsky.social · 06/04/2025
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...
academic.oup.com
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
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The Lancet @thelancet.com · 06/04/2025
📃 Facts and myths about #measles “Measles is a ‘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 ➡️ hubs.ly/Q03g26gH0
hubs.ly
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...
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Kai Kupferschmidt @kakape.bsky.social · 06/04/2025
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 🧪
nytimes.com
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 “elimination” status.
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Jose-Luis Jimenez @jljcolorado.bsky.social · 06/04/2025
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/...
theguardian.com
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
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LET'S AIR @nousaerons.bsky.social · 05/04/2025
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
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Nicolas Fulghum @nicolasfulghum.bsky.social · 04/04/2025
NEW | Fossil fuels fall below 50% of US electricity for the first month on record 🇺🇸 Among all the turmoil, some positive news from the latest @ember-energy.org data for March 2025: 🏆↘️ The share of fossil fuels fell to a record low of 49.2% 🏆↗️ Wind and solar power hit a new record high of 24.4%
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Prof Christina Pagel @chrischirp.bsky.social · 28/03/2025
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...
christinapagel.substack.com
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.
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Stand Up for Science! @standupforscience.net · 24/03/2025
EPA Solidarity walks are happening TOMORROW, May 25th in cities across the United States! ☀️🌎💧 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
linktr.ee
EPA Solidarity | Linktree
Clean water and clean air are human rights. Join the fight. Stand with the EPA.
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Carl Zimmer @carlzimmer.com · 21/03/2025
“The 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...
cidrap.umn.edu
African leaders take stock of health cuts, chart path forward
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Carl T. Bergstrom @carlbergstrom.com · 18/03/2025
The Great Barrington Declaration, but for chickens. RFK Jr. is truly the stupidest motherfucker.
nytimes.com
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.
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Denise Wheeler @denisedwheeler.bsky.social · 17/03/2025
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.
kffhealthnews.org
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...
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Ian Weissman, DO @drianweissman.bsky.social · 15/03/2025
"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...
nbcnews.com
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.
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Brian Kahn @blkahn.bsky.social · 13/03/2025
Just thinking about what the US looked like before the EPA existed
A vintage photo from the National Archives shows smog hanging over the New York skylineA vintage photo from the National Archives shows damaged oil drums piled high at an Exxon refinery. A vintage photo from the National Archives shows cars driving down a road as smoke spews from factories in the distance and air pollution hangs over everything.A vintage photo from the National Archives shows smog in Los Angeles taken from a high vantage point.
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Prof Christina Pagel @chrischirp.bsky.social · 12/03/2025
🧵Censor, purge, defund - how Trump is following the authoritarian playbook on science & universities. This isn't chaos - it's deliberate & well-established methods. I've mapped 40 actions into 3 categories covering attacks on science, attacks on universities and international collaboration. 1/16
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Jon Levy @jonlevybu.bsky.social · 13/03/2025
The thing is, EPA can’t just change many of these regulations by decree. They are legally mandated to provide the underlying science. So this is like a coach publishing the playbook before the Super Bowl and declaring victory. It doesn’t work that way, and now the other side can plan its defense.
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 13/03/2025
As long as I live, I will never understand how “it should be easier for multi-billion-dollar corporations to dump poison in the water my children drink” became popular politics with half the country. www.nbcnews.com/science/envi... 🌎🧪
nbcnews.com
EPA administrator announces huge rollback of environmental regulations
Lee Zeldin said he will reconsider a list of core EPA policies, including emissions standards for vehicles and the finding that serves as the basis for addressing climate change.
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Eric Topol @erictopol.bsky.social · 12/03/2025
Cartoon by @paulnoth.bsky.social
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Jose-Luis Jimenez @jljcolorado.bsky.social · 08/03/2025
In “Air-Borne” Carl Zimmer uncovers the mysteries filling our lungs www.nytimes.com/2025/03/08/b... "The Covid‑19 pandemic made the ocean of gases surrounding us visible,” Zimmer writes.
nytimes.com
Book Review: ‘Air-Borne,’ by Carl Zimmer
In “Air-Borne,” his detailed and gripping account of aerobiology, Carl Zimmer uncovers the mysteries filling our lungs.
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Jose-Luis Jimenez @jljcolorado.bsky.social · 08/03/2025
Just got my copy of @carlzimmer.com's book, looking forward to reading this evening :-)
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Molly Jong-Fast @mollyjongfast.bsky.social · 01/03/2025
The bloodbath at NOAA apparently included meteorologists with the National Weather Service; scientists inside what’s simply known as NOAA Research, or the office of Oceanic and Atmospheric Research (OAR) more formally; technicians that keep up the country’s weather instrumentation;
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Carl T. Bergstrom @carlbergstrom.com · 02/03/2025
"The US May Start Vaccinating Chickens Against Bird Flu." But under RFK Jr., people are shit outta luck.
"The US May Start Vaccinating Chickens Against Bird Flu."HHS weighs rescinding Moderna bird flu vaccine contract
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Jose-Luis Jimenez @jljcolorado.bsky.social · 01/03/2025
Large demonstration at Tesla in Superior, CO against Elon Musk and the Trump administration
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Linsey Marr @linseymarr.bsky.social · 28/02/2025
Yup, this would have brought together experts to share the latest findings on respiratory virus transmission. The meeting is canceled, but the continuing spread and evolution of H5N1 and other respiratory pathogens is not. In the middle of the game, the defense is walking off the field.
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Jose-Luis Jimenez @jljcolorado.bsky.social · 01/03/2025
That Colorado guy being diplomatic all over again! 😂 Looking forward to reading the book!
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Eric Topol @erictopol.bsky.social · 28/02/2025
AIR-BORNE, @carlzimmer.com's new book, is an enthralling deep dive into airborne diseases. The colossal failure to recognize that #COVIDisAirborne is thoroughly reviewed. Our podcast erictopol.substack.com/p/carl-zimme... Open-access, with transcript and full video, + relevant links
erictopol.substack.com
Carl Zimmer: Air-Borne and the Big Miss With Covid
One of the top science journalists of our time discusses his new book
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Kendra "Gloom is My Beat" Pierre-Louis @kendrawrites.com · 08/03/2024
Measles can cause immune amnesia so catching measles might mean that you would have to get every vaccine you've ever gotten over again and every cold, flu and infection your body has already learned to fight off it would forget. Except for measles itself.
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Katie Mack @astrokatie.com · 26/02/2025
Sharing these numbers because I wasn't aware of them myself. In the US: * 1 in 5 unvaccinated people who get measles are hospitalized * 1 in 20 children with measles get pneumonia * 1 to 3 in 1000 die If you're not immune, close contact with an infected person gives you measles 90% of the time
nfid.org
Measles – NFID
Measles is a highly contagious respiratory disease that can result in severe, sometimes permanent, complications including pneumonia, seizures, brain damage, and even death
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Krystal Vasquez @kvasquez.bsky.social · 24/02/2025
A deeper look at NSF's recent layoffs and what that could mean for US science: cen.acs.org/careers/Impa... According to sources, this is one of several workforce reductions NSF plans to do.
cen.acs.org
Impacts of NSF firings come into focus as scientists weigh next steps
Remaining National Science Foundation employees are strategizing ways to uphold the agency’s mission
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Carl Zimmer @carlzimmer.com · 18/02/2025
The head of the food division at the US Food and Drug Administration has quit in protest over sweeping staff cuts that he warns will hamper the agency’s ability to protect public health. www.theguardian.com/us-news/2025...
theguardian.com
Food head at FDA quits citing Trump administration’s mass staff cuts
Jim Jones, who joined Food and Drug Administration in 2023, says layoffs would make it ‘fruitless’ to continue in role
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Judd Legum @juddlegum.bsky.social · 19/02/2025
“The U.S. Department of Agriculture said Tuesday that, over the weekend, it accidentally fired "several" agency employees who are working on the federal government's response to the H5N1 avian flu outbreak. The agency said it is now trying to quickly reverse the firings.”
nbcnews.com
USDA accidentally fired officials working on bird flu and is now trying to rehire them
An Agriculture Department spokesperson told NBC News that officials are "working to swiftly rectify the situation."
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