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Soren Larsen

@sorenlouislarsen

Host heterogeneity and infectious disease dynamics. Postdoc @ UC Berkeley Demography. Views my own. (he/him)

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02.02.2025
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Latest posts by Soren Larsen @sorenlouislarsen

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Boy, 7, dies of brain condition caused by world’s most contagious disease — years after he had it as a baby Even those who make a full recovery from the initial infection face a lurking threat: a deadly disease that remains latent until striking — and killing — years later.

California boy dies of SSPE (measles complication) after being infected at age 7 months, when he was too young to be vaccinated.

10.03.2026 14:53 👍 555 🔁 312 💬 21 📌 94

Happy International Women’s Day! Grateful for the incredible women in my life and special shout out to the women in my lab whose ideas, creativity, and perseverance make our science and our community stronger every day. It’s a joy to learn from and work alongside you.

08.03.2026 14:00 👍 1 🔁 1 💬 0 📌 0

Oh, really? Were the strikes kinetic in nature? Was their synergy between the warfighting paradigms? Did you all ideate a 360-degree workaround for the blockchain?

02.03.2026 22:41 👍 2372 🔁 315 💬 121 📌 15

Made a short video as a response. 3 questions remain for me.

1) What is the definition of a "DEl activity," and how is it being communicated to NIH staff so they can determine whether a grant qualifies?

(Continued below)

01.03.2026 22:24 👍 116 🔁 50 💬 6 📌 8

Genuinely astonishing how clueless The Times when it comes to everything about DIYing - in particular the scale at which it is happening. Literally, what did they expect? People can't stop being trans.

Streeting must know - but his preference is that trans people die in private not live in public.

02.03.2026 06:41 👍 808 🔁 83 💬 6 📌 2
Doctors fear young at risk from ‘black-market trans hormones’ Medics call for an urgent investigation into trans community groups offering support on accessing supplies for self-medication

Well, yes, trans people are getting drugs; yes, from entirely unregulated sources; yes, without counselling; yes, without blood tests; yes, they are self-administering; yes, without clinical oversight; yes, risking long term harm; yes, it is highly suboptimal.

What did you think would happen?

02.03.2026 06:34 👍 1958 🔁 437 💬 50 📌 64

Disturbing to see every trans person on my timeline vocally distressed about the shit in Kansas, a huge step towards banning trans folk from public life there, and total crickets from the majority of cis folk

It's been decades of trans folk pleading cis folk to step up. If not now, when?

26.02.2026 11:17 👍 477 🔁 173 💬 1 📌 7

As of tonight, licenses of trans people across Kansas are being invalidated en masse, enabling the overnight criminalization of an entire group of people for going about our lives. It’s often said you never know when you’re living through history, so let me assure you: that’s what’s happening now.

26.02.2026 01:30 👍 10823 🔁 5229 💬 86 📌 338

“We are taking back your papers, you have no papers now” is even more chilling than “show us your papers”

26.02.2026 07:19 👍 837 🔁 279 💬 6 📌 6

This was all in response to the Kansas supreme court striking down attempts by the Kansas AG to do this last year.

26.02.2026 03:31 👍 718 🔁 80 💬 8 📌 0

Kansas lawmakers bypassed the committee process by doing a whole bill amendment and pushing this in two days. They then overrode the governors veto. They used emergency designation to make it go into effect immediately. There's no grace period. The amount of targeted animus here is staggering.

26.02.2026 03:30 👍 1284 🔁 302 💬 13 📌 14

I can't even begin to describe just how fucked up this law is. People cannot drive to work, to school, or even the DMV to fix this without the threat of being arrested for driving on a suspended license. It literally removes the ability for trans Kansans to participate in society.

26.02.2026 03:18 👍 1099 🔁 210 💬 6 📌 4

Because of the National driver register, since their licenses are suspended, trans folks cannot move to another state and get a new license until they remove the suspension on their existing Kansas license.

They can't even escape this by moving to another state.

26.02.2026 03:14 👍 4408 🔁 2399 💬 96 📌 113
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American Psychological Association Reaffirms Support For Trans Youth Care, Pushes Back Against NYT A recent article from Jesse Singal in the New York Times seemed to indicate the organization might be quietly retreating from supporting trans youth care.

1. Major news on trans youth care. The American Psychological Association has reaffirmed its full support for its 2024 guidelines supporting trans youth car.e

It provided documentation showing Jesse Singal mischaracterized their position in the NYT.

Subscribe to support our journalism.

25.02.2026 19:56 👍 3747 🔁 1286 💬 38 📌 41
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Guinea-Bissau officials stop CDC-funded hepatitis B vaccine trial The country's foreign minister told Reuters the controversial trial is "not going to happen."

BREAKING NEWS: Unethical, CDC Infant Hep B Vaccination Study Cancelled!

The study was cancelled after Stand Up for Science held a closed door briefing with Congress last week, with an investigator on the ground in Guinea Bissau.
(1/2🧵)

www.cidrap.umn.edu/hepatitis/gu...

25.02.2026 14:49 👍 406 🔁 110 💬 8 📌 7
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Fact Check: Jesse Singal Lies About Trans Care At The New York Times The New York Times spreads misinformation about transgender people yet again.

1. The New York Times, unsurprisingly, has released yet another hit piece on transgender people.

This time, it comes from Jesse Singal.

I fact check it in my latest piece.

End your NYT subscription, and put it towards people doing good work on the issue.

Subscribe to support our journalism.

24.02.2026 21:33 👍 2440 🔁 866 💬 52 📌 56

If you weren’t yet onboard with our boycott of NYT Opinion over the NYT’s coverage of Gaza, we invite you to join us at any time over its coverage of trans people

24.02.2026 16:05 👍 42 🔁 9 💬 0 📌 0
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JAMA Investigation: 26% of Trans and Gender Diverse Youth Have Attempted Suicide The highest attempt rates came out of North America amidst the United States’ war on trans kids.

The latest review from JAMA Pediatrics has uncovered that 26% of trans youth have attempted suicide. That's actual attempts, ideation was even higher.

The trend was most pronounced in North America, where anti-trans laws have been common.

The latest from our writer S. Baum.

19.02.2026 00:59 👍 1066 🔁 314 💬 15 📌 30

I'm going to London in April and really quite concerned about what the situation will be. I'm not sure anyone is thinking rationally

13.02.2026 17:24 👍 1 🔁 0 💬 1 📌 0

If you are a student whose NSF GRFP application was returned without review for vague 'eligibility' reasons:
1) Let your department chair & Graduate School know. Encourage them to contact NSF & congress
2) Write to your congressional reps.
3) Write to grfp@nsf.gov to request re-consideration;

30.01.2026 17:15 👍 95 🔁 83 💬 7 📌 0

@hakeem-jeffries.bsky.social: this is your line in the sand? Something that is already illegal? I mean is this a joke?

30.01.2026 01:32 👍 193 🔁 47 💬 15 📌 4
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There is a cost to science denial.

27.01.2026 21:29 👍 232 🔁 100 💬 7 📌 4

The biggest risk in this moment is something sociologists call “symbolic compliance.”

That’s when an institution that is violating civil rights gives the public just enough symbolic victories that accountability efforts lose steam before there has been any meaningful change.

26.01.2026 23:35 👍 20842 🔁 8641 💬 266 📌 714
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William H. Foege, Key Figure in the Eradication of Smallpox, Dies at 89

We lost a giant in public health today.

Dr. William H. Foege helped eradicate #smallpox - the only human disease ever eliminated—through science, surveillance, and vaccines.

His legacy is the antidote to today’s antiscience, anti-vaccine rhetoric.

www.nytimes.com/2026/01/24/u...

25.01.2026 05:48 👍 304 🔁 93 💬 7 📌 3
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Alex Pretti, who is identified as the man fatally shot by a U.S. Border Patrol officer in Minneapolis on Saturday, was an intensive care nurse dedicated to treating veterans.

Read more about him here: https://wapo.st/3M62eyV

24.01.2026 22:52 👍 472 🔁 226 💬 46 📌 14
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We are excited to share our upcoming line-up of Brown Bag talks for the 2026 Spring semester!

Our Brown Bag talks are held every Wednesday at noon (PT) at the UC Berkeley Demography Department's Seminar Room (310 Social Sciences Building), and via Zoom. Join us starting next week!

20.01.2026 20:50 👍 4 🔁 4 💬 0 📌 0
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Lipstick on a Pig: Why the Amended Hepatitis B Birth-Dose Trial in Guinea Bissau Remains Ethically Indefensible How Scrutiny and African Leadership Changed the Conversation

Reports said the trial was halted. HHS says it will proceed. The revised protocol remains unethical. Scrutiny must continue until participants are no longer placed in harm’s way. I read the revised protocol and wrote a follow-up.
bktitanji.substack.com/p/lipstick-o...

16.01.2026 19:18 👍 102 🔁 49 💬 2 📌 5
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Controversial US study on hepatitis B vaccines in Africa is cancelled $1.6m project drew outrage over ethical questions about withholding vaccines proven to prevent disease

One of the most valuable lessons my father taught me was to use my voice to speak up whenever I see wrong doing.
Thanks to every researcher who spoke up against this unethical study and for every reporter who amplified. Advocacy matters. @melodyschreiber.com
www.theguardian.com/us-news/2026...

15.01.2026 15:32 👍 227 🔁 76 💬 8 📌 8

I really want ppl w/o Minneapolis connections to understand

You might've heard that Mpls public schools went hybrid bc so many families are in hiding. Well, a coworker just told me that today, during his kid's hybrid class, a kid's apt building was raided onscreen

*Everyone has stories like this*

13.01.2026 18:06 👍 19761 🔁 8232 💬 355 📌 357