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David Hartley

@hartleydm

Mathematical epidemiologist working on complex systems, infectious disease, and public health.

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17.12.2023
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Latest posts by David Hartley @hartleydm

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How Congress can restore the independence of US science Members must go beyond reinstating US government research spending and re-establish decentralized governance at the National Institutes of Health and other agencies.

The most impt change at #NIH and to US science this year is bigger than grant cancellations— it’s how the agency is governed.

For 75 years NIH has been largely independent of presidential control. That’s changed this year. New piece from me and @nataliebaviles.bsky.social in @nature.com
🧪

09.03.2026 12:26 👍 264 🔁 151 💬 4 📌 4
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New research article

Spatiotemporal patterns of #RiftValleyFever virus in Africa: a retrospective genomic epidemiology and phylodynamic modelling study

www.thelancet.com/journals/lan...

#IDSky #ClinMicro #ViroSky #RVFV #OpenAccess #OA

19.02.2026 07:39 👍 2 🔁 4 💬 0 📌 0
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Rift Valley fever vaccines for animals and people: Envisioning One Health vaccination strategies | CABI One Health Abstract Background: Rift Valley fever (RVF) is a zoonotic viral disease transmitted by mosquitoes, that causes significant impacts on animal health, public health, and socio-economic wellbeing in aff...

Rift Valley fever vaccines for animals and people: Envisioning One Health vaccination strategies

www.cabidigitallibrary.org/doi/10.1079/...

11.02.2026 13:19 👍 2 🔁 0 💬 0 📌 0
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South Carolina measles outbreak reaches 789 cases, surpassing Texas The ongoing outbreak is the largest since measles was eliminated in the country 26 years ago.

South Carolina measles outbreak reaches 789 cases, surpassing Texas

www.nbcnews.com/health/healt...

27.01.2026 20:40 👍 0 🔁 0 💬 0 📌 0

First detection of blaDHA-1 carrying XDR Shigella in the U.S. in two patients, with unclear transmission route
https://beaconbio.org/en/report/?reportid=622652f3-858a-474b-bec1-9fab6f62acd3&eventid=6f0d5b09-2acb-40a8-b7e7-1a54bd1caa1b&utm_source=bluesky&utm_medium=social&utm_campaign=socialpost

18.01.2026 14:15 👍 0 🔁 1 💬 0 📌 0
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'Staring over the edge': South Carolina measles outbreak doubles in a week More than 500 people are in a 21-day quarantine and about 200 are "actively infected." The largest outbreak currently in the U.S. has spread to at least three other states.

'Staring over the edge': South Carolina measles outbreak doubles in a week

www.nbcnews.com/health/healt...

17.01.2026 02:42 👍 3 🔁 0 💬 0 📌 0
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Want to get the data out of a PDF figure? As in, the actual data – not a rough trace-along-the-lines version?

I made an app you might like: adamkucharski.github.io/pdf2plot/

It all started a few years ago... 🧵

13.01.2026 21:12 👍 479 🔁 183 💬 18 📌 22
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South Carolina measles outbreak surges past 300 cases The state has confirmed 99 new cases since Tuesday. Arizona, North Carolina, Ohio and Utah are also reporting cases.

South Carolina measles outbreak surges past 300 cases
The state has confirmed 99 new cases since Tuesday. Arizona, North Carolina, Ohio and Utah are also reporting cases.

www.nbcnews.com/health/healt...

10.01.2026 02:00 👍 1 🔁 0 💬 0 📌 0
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Face masks ‘inadequate’ and should be swapped for respirators, WHO is advised Experts are urging guideline changes on what health professionals should wear to protect against flu-like illnesses including Covid

Face masks ‘inadequate’ and should be swapped for respirators, WHO is advised

www.theguardian.com/global-devel...

09.01.2026 18:29 👍 1 🔁 0 💬 0 📌 0
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Trump administration’s plan to shrink vaccine schedule sends health sector scrambling The health sector is working to navigate what could be the most significant changes to the U.S. vaccine program in decades.

This is an understatement: “It’s not clear to public health experts why the U.S., with a population 57 times larger and a vastly different health care system, would model its vaccine policies on Denmark. The nation has one of the most limited lists of recommended shots among peer countries.”

23.12.2025 18:43 👍 29 🔁 15 💬 3 📌 0
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As tetanus vaccination rates decline, doctors worry about rising case numbers The harrowing, deadly infection could make a comeback, especially in states vulnerable to climate-linked natural disasters, like Florida and Texas, an NBC News investigation finds.

As tetanus vaccination rates decline, doctors worry about rising case numbers

www.nbcnews.com/health/kids-...

24.12.2025 14:30 👍 0 🔁 0 💬 0 📌 0

Patient perspectives of patient engagement in medicine development: a qualitative study www.tandfonline.com/doi/pdf/10.1...

24.12.2025 02:42 👍 1 🔁 1 💬 0 📌 0
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Our GVHD Alliance partner nbmtLINK is hosting a one-hour Power Panel on GVHD symptoms on January 5, 2026.

An educational resource for those who’ve undergone a stem cell transplant, caregivers, and loved ones.

👉 Learn more and register:
www.nbmtlink.org/symptom-sign...

18.12.2025 15:58 👍 1 🔁 1 💬 0 📌 0
Webinars About Bone Marrow Transplant The Bone Marrow Transplant information in these webinars should not be construed as medical advice.

Symptoms & Signs of Chronic Graft Versus Host Disease: January 5, 2026

One hour Zoom webinar, sponsored by the National Bone Marrow Transplant Link, will host Dr. Andy Harris, Dr. Doris Ponce and Dr. Alina Markova of Memorial Sloan Kettering Cancer Center.
www.nbmtlink.org/webinars/

23.12.2025 15:31 👍 0 🔁 0 💬 0 📌 0
Update: Genetic Sequencing Results for Wisconsin Dairy Herd Detection of Highly Pathogenic Avian Influenza | Animal and Plant Health Inspection Service Contact: aphispress@usda.gov

Last weekend #USDA announced that Wisconsin had detected #H5N1 #birdflu in a dairy cow herd. Today the agency revealed that genetic analysis of virus from the herd shows this event was the result of a new spillover from "wildlife." www.aphis.usda.gov/news/agency-...

20.12.2025 01:20 👍 83 🔁 49 💬 2 📌 1
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CDC officials urge US flu vaccination after record child deaths last year Americans told ‘time to get vaccinated is now’ as concerning mutation of influenza virus circulates in US

CDC officials urge US flu vaccination after record child deaths last year

www.theguardian.com/us-news/2025...

18.12.2025 16:29 👍 3 🔁 1 💬 0 📌 1
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Measles outbreaks worsen in South Carolina, Arizona and Utah Nationally, the measles case count is nearing 2,000 for a disease that has been considered eliminated in the U.S. since 2000, a result of routine childhood vaccinations.

Measles outbreaks worsen in South Carolina, Arizona and Utah

www.cbsnews.com/news/measles...

17.12.2025 00:03 👍 2 🔁 1 💬 1 📌 0
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A Physics Renaissance Is Coming The field can no longer ignore the fundamental mystery posed by living things.

Many physicists have come to believe that a mystery is unfolding in every microbe, animal, and human—one that could redefine the field for the next generation, Adam Frank writes.

15.12.2025 14:30 👍 21 🔁 7 💬 3 📌 1
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South Carolina measles outbreak is 'accelerating,' driving hundreds into quarantine Some students who remain unvaccinated are now in a second 21-day quarantine since the beginning of the school year.

The measles outbreak in South Carolina is “accelerating” with no end in sight following Thanksgiving and other large gatherings, state health officials say.

10.12.2025 22:20 👍 1572 🔁 910 💬 263 📌 435
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Blaming some child deaths on covid shots, FDA vows stricter vaccine rules Vinay Prasad, the nation’s top vaccine regulator, said his team concluded that coronavirus shots were linked to children’s deaths, necessitating a new approach.

Blaming some child deaths on covid shots, FDA vows stricter vaccine rules

www.washingtonpost.com/health/2025/...

29.11.2025 18:06 👍 2 🔁 0 💬 0 📌 0
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Surging measles cases are 'fire alarm' warning that other diseases could be next As measles cases continue to rise around the globe, the World Health Organization warns it's a signal that other disease outbreaks could soon follow.

Surging measles cases are 'fire alarm' warning that other diseases could be next

www.nbcnews.com/health/healt...

28.11.2025 14:47 👍 1 🔁 0 💬 0 📌 0
Epistorm-Mix: Mapping Social Contact Patterns in the Post-Pandemic United States Epistorm-Mix provides individual-level contact data and contacts patterns characterization relevant for the spread of respiratory infectious diseases within the US population.

We’ve just released Epistorm-Mix, a new open dataset on how people in the U.S. mix across ages and settings in the post-COVID era.

📊 Contact-level data + contact matrices
Built for epidemic modeling & forecasting
Fully open data & code

🔗 www.epistorm.org/data/epistor...

25.11.2025 15:11 👍 30 🔁 19 💬 0 📌 1
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Economic evaluation of delaying the infant hepatitis B vaccination schedule Introduction Children who acquire hepatitis B virus (HBV) infection in early childhood through perinatal, household or community exposures are at highest risk of all age groups for experiencing chroni...

Economic evaluation of delaying the infant hepatitis B vaccination schedule

"Even brief delays in HepB vaccine initiation substantially increase HBV infections, adverse health outcomes, and health system costs."

@noelenelson.bsky.social

www.medrxiv.org/content/10.1...

25.11.2025 16:24 👍 0 🔁 0 💬 0 📌 0

CDC published the latest epidemiology on alpha gal syndrome early this year in @jamanetworkopen.com (open access) jamanetwork.com/journals/jam...

14.11.2025 13:35 👍 9 🔁 5 💬 0 📌 0
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Warnings rise for U.S. as severe flu strain causes outbreaks in Canada, U.K. A flu strain that emerged over the summer is causing "unprecedented" outbreaks in Japan, as well as in Canada and the U.K. The CDC hasn't provided insights on flu in the U.S. in nearly two months.

Warnings rise for U.S. as severe flu strain causes outbreaks in Canada, U.K.
www.nbcnews.com/health/healt...

13.11.2025 11:03 👍 5 🔁 1 💬 0 📌 0
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This tight-knit community was recovering from a cultlike leader. Then measles got in. Years after the reign of Warren Jeffs, the Short Creek community on the Utah-Arizona border is focused on rebuilding. Missed vaccines were low on the list of priorities, until now.

This tight-knit community was recovering from a cultlike leader. Then measles got in.
www.nbcnews.com/health/healt...

01.11.2025 11:31 👍 1 🔁 0 💬 0 📌 0
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Diphtheria, a Once Vanquished Killer of Children, Is Resurgent

Diphtheria, a Once Vanquished Killer of Children, Is Resurgent www.nytimes.com/2025/10/27/h...

27.10.2025 21:36 👍 0 🔁 1 💬 0 📌 0
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Community-Acquired Respiratory Virus Infections: A Threat to Long-Term Survivors After Allogeneic Stem Cell Transplant? Late community-acquired respiratory virus (CARV) infections in long-term allogeneic hematopoietic stem cell transplantation (allo-HCT) survivors carry sign

Community-Acquired Respiratory Virus Infections: A Threat to Long-Term Survivors After Allogeneic Stem Cell Transplant?

#IDSky

27.10.2025 22:13 👍 3 🔁 3 💬 0 📌 7
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Threat to US vaccines as CDC staff supporting key advisory panel laid off Critics say scientists ‘held hostage’ by RFK Jr as changes mean vaccine development and guidance in peril

The ACIP meeting planned for 22-23 October has been indefinitely postponed. www.theguardian.com/us-news/2025...

27.10.2025 21:18 👍 30 🔁 24 💬 1 📌 4