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Daniel Citron

@dtcitron.bsky.social
909 followers 164 following 284 posts

Applied mathematics for epidemiology | Infectious disease modeling | Digital data for health | HIV | Malaria Opinions my own

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Daniel Citron @dtcitron.bsky.social · 22/09/2026
My new best friend is George, the #tortoise living at PetQua in Manhattan. He’s 27 years young.
Tortoise TortoiseTortoise
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Daniel Citron @dtcitron.bsky.social · 14/09/2026
New paper out! How has mental health impacted the #HIV epidemic and how has the HIV epidemic impacted mental health in Western Kenya? A mathematical modelling study We modeled how HIV and depression interact with and exacerbate each other. gh.bmj.com/content/11/8...
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Daniel Citron @dtcitron.bsky.social · 11/09/2026
New paper out! #HIV diagnosis and treatment status in individuals dying from HIV in Zimbabwe, Malawi, and South Africa: A model comparison analysis - we used our models to look for where the care continuum is failing and where preventable deaths tend to occur doi.org/10.1371/jour...
doi.org
HIV diagnosis and treatment status in individuals dying from HIV in Zimbabwe, Malawi, and South Africa: A model comparison analysis
In a comparison of seven HIV simulation models, Loveleen Bansi-Matharu and colleagues identify distinct points in the HIV care cascade where deaths occur in people with HIV in Zimbabwe, Malawi and Sou...
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Daniel Citron @dtcitron.bsky.social · 07/09/2026
2026 IgNobel Prize Winners announced! improbable.com/ig/winners/?...
improbable.com
Past Ig Winners
Ig® Nobel Prize Winners For achievements that first make people LAUGH then make them THINK Winners by year: 2026 : 2025 : 2024 : 2023 : 2022 : 2021 2020 : 2019 : 2018 : 2017 : 2016 2015 : 2014 : 20…
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Daniel Citron @dtcitron.bsky.social · 03/09/2026
Submitted this oceanic whitetip shark designed by Winston Lee to an #origami contest @origamibyboice.bsky.social
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Daniel Citron @dtcitron.bsky.social · 02/09/2026
New paper out! "Cost-Effectiveness and Impact of Depression Treatment Implementation on HIV Outcomes in Western Kenya: A Mathematical Modelling Study" onlinelibrary.wiley.com/doi/10.1002/...
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Daniel Citron @dtcitron.bsky.social · 30/08/2026
Friend spotted this praying mantis #InverteFest
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Daniel Citron @dtcitron.bsky.social · 29/08/2026
Delighted to see a cicada up close in the wild in Chicago yesterday #InverteFest
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Daniel Citron @dtcitron.bsky.social · 20/08/2026
LEAF SHEEP LEAF SHEEP LEAF SHEEP
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Daniel Citron @dtcitron.bsky.social · 17/08/2026
Saw this installation of “Untitled” (Portrait of Ross in LA) at MOMA last weekend. It’s a profound piece, I felt too moved to participate in eating the candy. But there were many people present who really seemed to really enjoy the candy, which added another layer to the experience.
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Daniel Citron @dtcitron.bsky.social · 14/08/2026
Leaf sheep army rise up www.theguardian.com/environment/...
theguardian.com
Invertebrate of the year 2026: vote for your favourite
We’ve gone in search of the invertebrate of the year. Now it’s your chance to choose
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The Guardian @theguardian.com · 09/08/2026
‘Panda of the insect world’: the moscardón bumblebee creates buzz for invertebrate of the year
theguardian.com
‘Panda of the insect world’: the moscardón bumblebee creates buzz for invertebrate of the year
Bombus dahlbomii, a giant ginger bumblebee fondly known as the flying mouse, is in decline in its native Patagonia due to commercial farming
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Daniel Citron @dtcitron.bsky.social · 06/08/2026
Also interested in entering the Mantel-verse #booksky
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Daniel Citron @dtcitron.bsky.social · 30/07/2026
Was anyone currently at #AIDS2026 present for this? www.reuters.com/world/africa...
reuters.com
US government map of Africa mislabels every country at global conference
A U.S. government map of Africa mislabeled every country during a State Department presentation at ‌a global conference taking place in Brazil this week, causing a stir among attendees who took screen...
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IAC - the International AIDS Conference @aidsconference.bsky.social · 28/07/2026
📰 New from @npr.org : #AIDS2026 is in the spotlight. The story features leading experts, including IAS President-Elect Kenneth Ngure, and explores the latest advances in HIV prevention and treatment alongside the urgent need to sustain the global HIV response.
npr.org
Amid U.S. funding cuts, the International AIDS Conference faces an uncertain future
Dr. Kenneth Ngure, president-elect of the International AIDS Society, says, "We have had very good scientific advances ... yet the funding cuts have also taken us back."
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Needhi Bhalla 💅🏽 @needhibhalla.bsky.social · 30/07/2026
“The pandemic was a global phenomenon, but it seems to have broken the US in a unique way. Other countries had more serious lockdowns without entering a political psychosis.”
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Daniel Citron @dtcitron.bsky.social · 30/07/2026
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Daniel Citron @dtcitron.bsky.social · 24/07/2026
#Origami USA convention is this week! From @origamibyboice.bsky.social NO AI ART
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Daniel Citron @dtcitron.bsky.social · 17/07/2026
Today a colleague forwarded this article to me, from Joseph Redmon and Ali Farhadi YOLOv3: An Incremental Improvement arxiv.org/abs/1804.02767 The relevant passage:
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Daniel Citron @dtcitron.bsky.social · 13/07/2026
I just did this for the second time, it took me about 20 minutes, and it feels great to be working together with so many other fellow citizens who understand how damaging this is going to be for all Americans.
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Sarah Gollust @sarahgollust.bsky.social · 11/07/2026
Did you write your comment yet on the OMB rules on federally funded science yet? No? Don’t worry, you can do it this weekend. Here are some resources that can help you get started.
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Daniel Citron @dtcitron.bsky.social · 11/07/2026
Putting this out there in case we need it later
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Daniel Citron @dtcitron.bsky.social · 09/07/2026
In Antarctica, nobody knows you’re the thing
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Daniel Citron @dtcitron.bsky.social · 09/07/2026
I did this and so can you!
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Daniel Citron @dtcitron.bsky.social · 04/07/2026
I read Ta-Nehisi Coates’s Captain America run earlier this year, a book which wrestles with what America means, and what it still could mean in the future we want to build, even after falling into the clutches of authoritarianism. The run references these panels from 30 years earlier throughout.
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Daniel Citron @dtcitron.bsky.social · 29/06/2026
Went looking for horseshoe crabs in Jamaica Bay. I missed the season when they’re around but did do some #origami nature photography.
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Daniel Citron @dtcitron.bsky.social · 23/06/2026
I love any writing that really digs into the affective experience of playing games, and so I loved this article from @duckvalentine.bsky.social about the experience of playing Blue Prince. kotaku.com/i-am-looking...
kotaku.com
I Am Looking For My Father In Blue Prince’s Spiral Of Stars - Kotaku
There are two true boxes in this room
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Daniel Citron @dtcitron.bsky.social · 23/06/2026
I've found that when I use LLM tools in my professional work - writing or coding - usually I have to put a great deal of thought into what I want the model to produce. If I don't do that, if I rely on the tool to do my thinking for me, the end result is not very useful.
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Daniel Citron @dtcitron.bsky.social · 18/06/2026
Going to sneakily edit wikipedia to say that it was named for Lord Wiggins, the Earl of Disappointment
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Daniel Citron @dtcitron.bsky.social · 11/06/2026
Three incredible Blaschka glass #octopus models from Harvard's Museum of Comparative Zoology, second photo shows both male and female argonaut specimens and an argonaut shell.
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Daniel Citron @dtcitron.bsky.social · 09/06/2026
More Moropus content, today at the Harvard Museum of Comparative Zoology
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Daniel Citron @dtcitron.bsky.social · 08/06/2026
I took this picture of a shark hanging out in front of a jet for many minutes at the New England aquarium. @whysharksmatter.bsky.social is the shark doing this for a reason? Is it doing anything that could be described as having fun?
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Stand Up for Science! @standupforscience.net · 07/06/2026
Russell Vought has a plan for science, but so do we. Join the fight by taking action against the latest OMB grant funding proposal here 👉 zurl.co/Q8eBE #StandUpForScience #OMB #Vought #SaveScience #Science
The graphic displays a photo of Russell Vought, the White House, and the white Stand Up for Science logo. The graphic reads: "ALL scientific research is in danger, Stop Vought. Save Science. TAKE ACTION NOW! 1. Email & Call Your Members of Congress 2. Leave a Public Comment 3. Donate to Fuel the Fight for Science, LINK IN BIO".
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Daniel Citron @dtcitron.bsky.social · 02/06/2026
Satoshi Kamiya #origami phoenix, on display at @qplnyc.bsky.social last month
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Daniel Citron @dtcitron.bsky.social · 27/05/2026
www.npr.org/2026/05/21/n...
npr.org
As floods get worse, Britain tries a new solution: beavers
About 400 years ago, beavers were hunted to extinction across Britain. Now they're being reintroduced as little climate warriors, as communities harness their dam-building skills to mitigate flooding.
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Daniel Citron @dtcitron.bsky.social · 22/05/2026
Great googly woogly onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com
Evaluating Aversion to Eye‐Like Stimuli as a Foraging Deterrent in Urban European Herring Gulls
We tested whether eye-like and high contrast patterns on takeaway food boxes deterred urban herring gulls from approaching and pecking at food boxes. Gulls were slower to approach and less likely to ....
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Faine Greenwood @faineg.com · 21/05/2026
“Everyone, especially in South Sudan, wanted to know if the US really had cut off aid. It was easier for them to believe that the aid organizations were lying to them than to think that the United States would do this.”
motherjones.com
Trump destroyed USAID. Now people are dying.
ProPublica’s Brett Murphy and Anna Maria Barry-Jester examine how America’s foreign aid cuts are threatening the survival of the world’s most vulnerable populations.
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Daniel Citron @dtcitron.bsky.social · 15/05/2026
Appalling how destructive it was to end USAID
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Frank Cifaldi @frankcifaldi.bsky.social · 03/05/2026
It is my duty to inform you that there are baby capybaras at the Sacramento Zoo
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Daniel Citron @dtcitron.bsky.social · 10/04/2026
iranwarcost.watson.brown.edu For a second I thought the cost burden in California was high here because of the rising costs of fertilizer, but it appears this is *only* counting the costs of gasoline and diesel.
iranwarcost.watson.brown.edu
Iran War Energy Cost Tracker
Tracks the extra cost paid by U.S. consumers for gasoline and diesel since the Iran conflict began on February 28, 2026, compared against a no-war counterfactual baseline.
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Alison Fisk @alisonfisk.bsky.social · 02/04/2026
A 3,200 year-old painted scene of a lion and a gazelle playing a board game, probably senet. From an ancient Egyptian illustrated papyrus showing animals taking on human roles in comic situations where they act against their natural instincts. 📷 British Museum #Archaeology
The British Museum image shows a painted scene of a lion and a gazelle playing a board game, probably senet. They are seated on low stools, facing each other, across a low table on which a board game with black playing pieces is laid out. It is probably the popular ancient Egyptian board game senet. 

The gazelle sits on the left of the table facing the lion on the right. The animals are seated on their haunches, sitting upright, legs hanging down from the chair seat, and their forelegs raised, being used as arms. Each animal holds a game piece with their hoof and paw respectively. The gazelle is painted brown within a black outline. It has black hooves, two long, black, s-shaped curved horns, and a black dot for its eye. It has long pointed ears at the back of its head. The lion is painted a sandy brown within a black outline. It has a darker-brown shaggy mane and a black nose and eye. It’s mouth is ajar as if speaking.

Detail from an ancient Egyptian illustrated papyrus from Deir el-Medina
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Daniel Citron @dtcitron.bsky.social · 17/03/2026
It’s happening!
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Daniel Citron @dtcitron.bsky.social · 13/03/2026
Reading On Tyranny by Timothy Snyder this week and thinking about how to practice this: “Avoid doing violence to the minds of unseen others on the internet, others will learn to do the same.
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Jon Green @jongreen.bsky.social · 18/02/2026
X's algorithm is in fact doing what you think it's doing. www.nature.com/articles/s41...
Article: The political effects of X’s feed algorithm

Abstract: Feed algorithms are widely suspected to influence political attitudes. However, previous evidence from switching off the algorithm on Meta platforms found no political effects1. Here we present results from a 2023 field experiment on Elon Musk’s platform X shedding light on this puzzle. We assigned active US-based users randomly to either an algorithmic or a chronological feed for 7 weeks, measuring political attitudes and online behaviour. Switching from a chronological to an algorithmic feed increased engagement and shifted political opinion towards more conservative positions, particularly regarding policy priorities, perceptions of criminal investigations into Donald Trump and views on the war in Ukraine. In contrast, switching from the algorithmic to the chronological feed had no comparable effects. Neither switching the algorithm on nor switching it off significantly affected affective polarization or self-reported partisanship. To investigate the mechanism, we analysed users’ feed content and behaviour. We found that the algorithm promotes conservative content and demotes posts by traditional media. Exposure to algorithmic content leads users to follow conservative political activist accounts, which they continue to follow even after switching off the algorithm, helping explain the asymmetry in effects. These results suggest that initial exposure to X’s algorithm has persistent effects on users’ current political attitudes and account-following behaviour, even in the absence of a detectable effect on partisanship.Figure 2. ITT estimates of feed-setting changes on engagement and political attitudes. ITT effect estimates of switching the algorithm on and off (in s.d.). Left, effect of moving from the chronological to the algorithmic feed for users initially on the chronological feed. Right, effect of moving in the opposite direction for users initially on the algorithmic feed. For each outcome, the results of two specifications are reported. Blue, unconditional estimates with robust s.e., controlling only for the initial feed setting and, where applicable, pre-treatment outcome levels. Orange: conditional estimates, controlling for pre-treatment covariates using GRFs; 90% and 95% CIs are reported. Numerical effect sizes and P values correspond to the conditional estimates (all tests are two-sided). The unit of observation is respondent. From top to bottom, sample sizes are n = 4,965, n = 3,337, n = 4,965, n = 4,965, n = 4,596, n = 4,596 and n = 4,850. Tests are described in Methods. Supplementary Information Table 2.16 reports the exact numerical point estimates, s.e., CIs and sample sizes for every specification. All outcomes are standardized. Additional results are presented in Supplementary Information section 2. PCA, first principal component from principal component analysis.
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 12/02/2026
Meet the Metal Snail from the Bottom of the Ocean ocean.si.edu/ocean-life/i...
ocean.si.edu
Meet the Metal Snail from the Bottom of the Ocean
Live specimens of Chrysomallon squamiferum (known as the “scaly-foot snail”) from the Longqi vent field in the Southwestern Indian Ocean
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Daniel Citron @dtcitron.bsky.social · 11/02/2026
If you can live through February, you’ll live another year.
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Daniel Citron @dtcitron.bsky.social · 29/01/2026
Time to retire
QUIXOTE
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Daniel Citron @dtcitron.bsky.social · 25/01/2026
Highly recommend William Foege’s memoir “The Fears of the Rich, the Needs of the Poor” on public service through public health. Thank you for your career of service to Americans and to the world. www.nytimes.com/2026/01/24/u...
nytimes.com
William H. Foege, Key Figure in the Eradication of Smallpox, Dies at 89
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depths of wikipedia @depthsofwikipedia.bsky.social · 15/01/2026
wikipedia turns 25 today! the last unenshittified major website! backbone of online info! triumph of humanity! powered by urge of unpaid randos to correct each other! somehow mostly reliable! "good thing wikipedia works in practice, because it sure doesn't work in theory" - old wiki adage
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Daniel Citron @dtcitron.bsky.social · 03/01/2026
Capybara and bird friend. #capybara model by Hiroaki Kobayashi, folded from papyrus. Homage to www.tumblr.com/animalssitti... #origami
Origami bird sitting on origami capybara
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