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An Open-Source Maintainer's Guide to Saying No

https://www.jlowin.dev/blog/oss-maintainers-guide-to-saying-no
84•jlowin•2h ago•28 comments

Magical systems thinking

https://worksinprogress.co/issue/magical-systems-thinking/
212•epb_hn•5h ago•63 comments

Show HN: A store that generates products from anything you type in search

https://anycrap.shop/
632•kafked•9h ago•217 comments

RIP pthread_cancel

https://eissing.org/icing/posts/rip_pthread_cancel/
105•robin_reala•4h ago•46 comments

486Tang – 486 on a credit-card-sized FPGA board

https://nand2mario.github.io/posts/2025/486tang_486_on_a_credit_card_size_fpga_board/
118•bitbrewer•6h ago•35 comments

Perceived Age

https://sdan.io/blog/perceived-age
46•jxmorris12•3d ago•22 comments

Mago: A fast PHP toolchain written in Rust

https://github.com/carthage-software/mago
120•AbuAssar•7h ago•49 comments

WhoBIRD is now deprecated on certified Android devices

https://github.com/woheller69/whoBIRD
23•proactivesvcs•1h ago•10 comments

‘Someone must know this guy’: four-year wedding crasher mystery solved

https://www.theguardian.com/uk-news/2025/sep/12/wedding-crasher-mystery-solved-four-years-bride-s...
163•wallflower•6h ago•41 comments

How Ruby executes JIT code

https://railsatscale.com/2025-09-08-how-ruby-executes-jit-code-the-hidden-mechanics-behind-the-ma...
47•ciconia•4d ago•0 comments

My First Impressions of Gleam

https://mtlynch.io/notes/gleam-first-impressions/
143•AlexeyBrin•8h ago•53 comments

Safe C++ proposal is not being continued

https://sibellavia.lol/posts/2025/09/safe-c-proposal-is-not-being-continued/
56•charles_irl•2h ago•28 comments

Show HN: CLAVIER-36 – A programming environment for generative music

https://clavier36.com/p/LtZDdcRP3haTWHErgvdM
82•river_dillon•7h ago•18 comments

The Case Against Social Media Is Stronger Than You Think

https://arachnemag.substack.com/p/the-case-against-social-media-is
14•ingve•2h ago•7 comments

Open Source SDR Ham Transceiver Prototype

https://m17project.org/2025/08/18/first-linht-tests/
58•crcastle•3d ago•7 comments

SkiftOS: A hobby OS built from scratch using C/C++ for ARM, x86, and RISC-V

https://skiftos.org
400•ksec•16h ago•76 comments

UTF-8 is a brilliant design

https://iamvishnu.com/posts/utf8-is-brilliant-design
759•vishnuharidas•1d ago•300 comments

Japan sets record of nearly 100k people aged over 100

https://www.bbc.com/news/articles/cd07nljlyv0o
257•bookofjoe•7h ago•155 comments

Lessons in Disabling RC4 in Active Directory

https://syfuhs.net/lessons-in-disabling-rc4-in-active-directory
3•speckx•2d ago•0 comments

Wimpy vs. McDonald's: The Battle of the Burgers

https://www.historytoday.com/archive/history-matters/wimpy-vs-mcdonalds-battle-burgers
8•lermontov•1d ago•7 comments

Java 25's new CPU-Time Profiler

https://mostlynerdless.de/blog/2025/06/11/java-25s-new-cpu-time-profiler-1/
149•SerCe•13h ago•80 comments

Energy-Based Transformers [video]

https://www.youtube.com/watch?v=LUQkWzjv2RM
25•surprisetalk•4d ago•2 comments

How to Use Claude Code Subagents to Parallelize Development

https://zachwills.net/how-to-use-claude-code-subagents-to-parallelize-development/
217•zachwills•4d ago•99 comments

Scientists are rethinking the immune effects of SARS-CoV-2

https://www.bmj.com/content/390/bmj.r1733
59•bookofjoe•2h ago•49 comments

QGIS is a free, open-source, cross platform geographical information system

https://github.com/qgis/QGIS
539•rcarmo•1d ago•119 comments

Legal win

https://ma.tt/2025/09/legal-win/
226•pentagrama•19h ago•192 comments

Many hard LeetCode problems are easy constraint problems

https://buttondown.com/hillelwayne/archive/many-hard-leetcode-problems-are-easy-constraint/
617•mpweiher•1d ago•493 comments

Weird CPU architectures, the MOV only CPU (2020)

https://justanotherelectronicsblog.com/?p=771
96•v9v•4d ago•28 comments

Show HN: Vicinae – A native, Raycast-compatible launcher for Linux

https://github.com/vicinaehq/vicinae
121•aurellius•4d ago•25 comments

The value of bringing a telephoto lens

https://avidandrew.com/telephoto.html
86•freediver•4d ago•89 comments
Open in hackernews

Scientists are rethinking the immune effects of SARS-CoV-2

https://www.bmj.com/content/390/bmj.r1733
59•bookofjoe•2h ago

Comments

Animats•2h ago
Uh oh. We don't even understand "long COVID" yet.

There's clearly a long-term aftermath, but it's not well understood. There are other diseases where that occurs, despite the initial infection seeming to be over. Chickenpox as a child can turn into shingles as an adult.[1] The virus is never completely cleared.

[1] https://health.clevelandclinic.org/can-you-get-shingles-if-y...

timr•1h ago
Please stop making this comparison. There's a clear reason why chickenpox can re-emerge as shingles later in life - herpesvirus maintains a circular chromosome within the nerve cells. It's a known feature of the virus family, and it's detectable [1].

There's absolutely no reason to believe that SARS-CoV2 has similar capability, and those who cling to this hypothesis are engaging in pseudoscience. Viruses are not so complex that we would trivially overlook a feature that would literally change the phylogenetic classification in a dramatic way.

[1] https://pmc.ncbi.nlm.nih.gov/articles/PMC5584196/

privatelypublic•1h ago
> Viruses are not so complex that we would trivially overlook a feature that would literally change the phylogenetic classification in a dramatic way.

You might think that, but in the past two decades theres been so many "how did we miss that?" in so many fields. I'll let field experts bring specifics up- I only know popularized examples like Roman Concrete. And the ever-easy Mars unit-conversion error.

timr•1h ago
You can speculate if you like, but the claim you're advancing is fantastical to anyone who has studied virology, and requires an accordingly fantastic level of supporting evidence.
privatelypublic•56m ago
The only claim I'm making is "never underestimate humanity's ability to hold to an initial assessment/viewpoint/assumption."

Which has so many examples it's almost a truism.

pessimizer•23m ago
I assume, with this level of confidence, that we understand everything about Parkinson's now. It is a nerve disease so closely associated with influenza that there was speculation in the 60s that when the last child born during the Spanish Flu epidemic died, it would be completely eliminated as a common disease.

Shouldn't we just look for the ring that we learned how to detect herpes in nerves? Because every virus has to be constructed exactly like herpes in order to infect nerve cells, apparently.

Animats•9m ago
Right, chickenpox has a very different aftereffect mechanism. I'm just arguing against the popular "when it's over, it's over" position.
PaulKeeble•1h ago
HIV 10 years later turns into AIDs. Immune disruptions are especially scary because without an immune system the constant bombardment the human body is under from viruses, bacteria and fungi overwhelms us quickly.

Finding Covid viral fragments in people long after the infection is very concerning, we don't know how its staying in the body or where but it seems likely its persisting.

ChrisMarshallNY•1h ago
Measles, too: https://arstechnica.com/health/2025/09/child-dies-of-horrify...

Several variants of Malaria can be The Gift That Keeps On Giving: https://www.mmv.org/malaria/symptoms-and-treatments/relapsin...

timr•1h ago
Malaria is not a virus. It's caused by a eukaryotic microorganism.
ChrisMarshallNY•1h ago
I know. I guess that I should have mentioned that.

However, from the article, it seems that they believe that COVID just whacks the immune system, in general, so everyone gets to belly up to the bar.

timr•1h ago
Just to be clear: "they", in this case, is a cherry-picked sample of scientists by a journalist.
ChrisMarshallNY•1h ago
I think that's pretty much always the case, these days. Shouldn't be a problem, finding a cherry-picked sample to refute it.
timr•1h ago
Rebutting this kind of stuff turns into a link-sharing competition. For any debated theory I can show you a thousand links saying the opposite of whatever claim is being advanced, but you'll just assume my links are self-selected.

Look at the content of the article. Literally every quote in this piece is some scientist speculating. That's completely fine, and what scientists do, but the "journalist" is spinning it into a narrative of "scientists believe X", which is both true (some scientists can be found to support literally any claim), and misleadingly over-confident.

Animats•13m ago
No, they're not saying that. Measles whacks the immune system.[1] COVID, fortunately, does not do that. What it does long-term is still badly understood.

[1] https://asm.org/articles/2019/may/measles-and-immune-amnesia

nomel•8m ago
Measles can cause immune amnesia [1], which I find fascinating, and maybe somewhat obvious: our immune system has limited/fragile "memory".

[1] https://asm.org/articles/2019/may/measles-and-immune-amnesia

btbuildem•2h ago
It's fascinating how unscientific ideas take root, because people want to believe. On the face of it, the idea of "immunity debt" is preposterous, yet it was amplified across the media -- perhaps because it was a convenient explanation that required no action from anyone.
ChrisMarshallNY•1h ago
One of my favorite cynical quotes, is:

> "There's always an easy solution to every human problem; Neat, plausible and wrong."

- H. L. Mencken

bee_rider•1h ago
Why does it seem preposterous? If anything it seems dangerously not-preposterous, a sort of epidemiological “common sense” explanation.

Lots of people experienced stuff like “getting chickenpox and then gaining immunity,” so the idea that not getting any illnesses for a couple years during lockdown would result in us being resistant to fewer illnesses seems not at all preposterous.

Apparently general infection rates are still high, so it didn’t bear out. But preposterous? Not really…

paulryanrogers•5m ago
Having had chicken pox twice, and read up on shingles, please get your kids vaccinated. Surviving an infection doesn't make us stronger, at least not at the individual level.
fzeroracer•2m ago
> Lots of people experienced stuff like “getting chickenpox and then gaining immunity,”

Using chickenpox as an example of people's common knowledge of immunity is inadvertently very funny here.

jimmaswell•58m ago
This is my first time hearing the phrase. Google says:

> Immunity debt refers to a theoretical concept that describes a potential decline in immune system function following a period of reduced exposure to infectious diseases.

Is this the same concept you're referring to? I would hardly call that a proposterous hypothesis at face value. It's reminiscent of the generally-accepted "hygiene hypothesis", that lack of early childhood exposure to some germs causes poor immune response or even asthma later in life.

https://www.fda.gov/vaccines-blood-biologics/consumers-biolo...

This page seems focused on RSV in particular, noting that in that specific case RSV seems to not have the beneficial effect of exposure to some other thing, yet still says it may have "seemed obvious" that it should have.

> The “hygiene hypothesis” is supported by epidemiologic studies demonstrating that allergic diseases and asthma are more likely to occur when the incidence and levels of endotoxin (bacterial lipopolysaccharide, or LPS) in the home are low. LPS is a bacterial molecule that stimulates and educates the immune system by triggering signals through a molecular “switch” called TLR4, which is found on certain immune system cells.

...

> It may seem obvious that, since both the RSV F protein and LPS signal through the same TLR4 “switch,” they both would educate the infant’s immune system in the same beneficial way. But that may not be the case.

apercu•12m ago
It’s also fascinating to me that people who want their feelings to be facts lean in to conservative politics in the country I reside in.
nprateem•1h ago
As i heard recently. Severe acute respiratory syndrome.

Something acute is severe by definition, but without the S we'd all be talking about ARS, so they added the Severe

fluidcruft•1h ago
I don't know what you are talking about definitions-wise here. Things can definitely be accute and not severe. This is easily resolved by looking at a dictionary.
rzzzt•1h ago
"acute" is paired with "chronic" and indicates onset, not severity.
rlpb•1h ago
So…CARS?
shawabawa3•1h ago
Pins and needles is usually acute, and harmless

Chronic pins and needles should be checked urgently by a doctor as it's very serious

PaulKeeble•1h ago
Its important to note that Immunity debt is a concept that anti lockdown activists created in 2020. It was not in medical texts before that point, it never had any science behind it. It was a political term used to end mitigations against Covid not a scientific fact.

There is no rethinking here from serious science (The BMJ is a really bad journal and one of the ones that supported this garbage), the science on infections has been clear for decades, every infection damages us. Covid especially so it damages the immune system directly suppressing CD4 and 8 T cells, B cells and other aspects. Its not a subtle change, in Long Covid research its become increasingly hard to find controls, many people without symptoms show the same blood based markers of immune dysruption and cognitive slowing.

timr•1h ago
> Its important to note that Immunity debt is a concept that anti lockdown activists created in 2020. It was not in medical texts before that point, it never had any science behind it. It was a political term used to end mitigations against Covid not a scientific fact.

No. It's a hypothesis, because nobody had any explanation for why flu "disappeared". You may not prefer that particular hypothesis, but that does not make it unscientific or political.

In fact, doing what you're doing right now -- trying to present the hypothesis as activism in order to remove it from the realm of reasonable discussion -- is inherently political.

> Covid especially so it damages the immune system directly suppressing CD4 and 8 T cells, B cells and other aspects.

There is no good evidence for this claim. We have robust T- and B-cell mediated immunity to prior Covid infection, and there are now hundreds, if not thousands of papers showing it. Please stop.

The general origin of this meme is the article linked in the piece, which, if you read the abstract you'll see is making a very limited claim about early infection, and cannot be used to support the notion that "Covid damages the immune system" in any long-term sense, particularly when we know the opposite is true from many, many other studies:

https://academic.oup.com/jleukbio/article-abstract/116/6/138...

I don't like to resort to appeal to authority, but the article quotes Ashish Jha (hardly a Covid minimizer) as dismissing the "immune damage" narrative:

> Ashish Jha, former White House covid-19 response coordinator under President Biden, has publicly rejected this hypothesis. “There’s a lot of bad information out there about how covid-19 damages the immune system. It really doesn’t,” he posted on X in early 2024. More than a year later, his view is unchanged.

https://x.com/ashishkjha/status/1747412684889354266

zzzeek•1h ago
> No. It's a hypothesis, because nobody had any explanation for why flu "disappeared". You may not prefer that particular hypothesis, but that does not make it unscientific or political.

I hypothesize the rise in these less common infections is none other than Santa Claus. You may not prefer that particular hypothesis, but that does not make it unscientific.....the fact that it's complete made up bullshit that, like the parent says of the "immunity debt" concept, "never had any science behind it.", is what makes it unscientific. That it's made up and was never shown by any evidence.

xboxnolifes•59m ago
Calling it anything other than a hypothesis is unscientific. Claiming it as a hypothesis is not.
exe34•32m ago
We should dedicate resources to finding Russell's teapot. My hypothesis is that there's useful information left in there by the almighty creator of the universe.
aurizon•8m ago
You mean Joe?
aredox•26m ago
>nobody had any explanation for why flu "disappeared"

The flu didn't disappear, and we know very well why it almost disappeared: it is far less contagious than SARS-CoV-2, and masking and the huge dip in international travel stopped it.

>It's a hypothesis

Here in Switzerland (and in France), it hasn't been presented by pediatrics societies as an hypothesis at all, but as a fact and the main argument to reopen immediately. It has also been used again and again to explain the huge waves of infections of many illnesses that surged after the end of lockdowns, and absolutely none of them ever quoted that "immune debt is just an hypothesis", and none of them have suggested any other alternative hypothesis such as "SARS-CoV-2 has a detrimental effect on the immune system or health in general".

Because to admit so would be to admit the mass infection of children had been a massive mistake on their part.

>I don't like to resort to appeal to authority, but the article quotes Ashish Jha (hardly a Covid minimizer) as dismissing the "immune damage" narrative

And Jha has no explanation for the increased, sustained (and now synchronised) waves of infections and illnesses that are plain to see. He has nothing. This is the fiasco of "masks aren't proven to work" again.

nostrebored•8m ago
… masks literally aren’t proven to work, and in every true RCT (hint: there are almost none!) there is neutral to negative impact.

they are a creative fiction to help people feel like they have control over their environment, not a substantially evidenced intervention.

mieses•55m ago
So what? Is there a medical term for the beneficial effects of putting dirt into your mouth as a child? How often does the expression "common sense" appear in medical texts? Therefore "common sense" is politicized garbage!

"Every movement we make damages our muscles" is also a true statement and can be misused by idiots.

Muromec•40m ago
>Is there a medical term for the beneficial effects of putting dirt into your mouth as a child?

"hygiene hypothesis"

Symmetry•15m ago
Importantly, though, humans evolved to live in environments full of random dirt microbes. We didn't really evolve to deal with repeated respiratory infections. Spillovers from wild animals would happen and kill a bunch of people from whatever group experienced them but then there'd be nobody left to infect and that strain would die out. It's only evolutionary relatively recently that our connected communities have become big enough to sustain this sort of disease. And the rate at which diseases cross over has increased rapidly as our population, contentedness, and meat diet has. Something like half the species of common cold didn't exist in 1800.

EDIT: Actually, I think learned opinion is that it might be our modern lack of intestinal parasites that could be making our immune system paranoid rather than a lack of dirt per se? Or maybe that's just the newer position with no consensus yet.

cjensen•45m ago
Are you criticizing something other than what is in this article? This article fully rejects the immunity debt hypothesis.

The article suggests that covid infections cause immunity amnesia similar to other known viruses. This is based on shingles and EBV reactivation incidence being higher in people who had covid.

pessimizer•32m ago
You should read the comment again. It says that this article is debunking something that was never a serious claim. That is the first thing it says, and it says it very directly. It is also set apart as its own paragraph, for emphasis.
aredox•30m ago
>something that was never a serious claim

And yet was claimed again and again by e.g. pediatrics societies in Switzerland and France to justify ending every restrictions (thereby mass contaminating children before they could be vaccinated, and contributing to more spread and more mutations of the virus)

pessimizer•22m ago
I'm not arguing the claim. I'm asking a person to read was said, and respond to it, instead of to something that was not said.
ahmedfromtunis•30m ago
As someone who is *not* interested in biology, I don't understand why this "immunity debt" is driving so much debate.

If I understand Vox's definition of the term[0] correctly, this should be very easy to confirm or debunk.

Why it isn't been the case yet?

[0]: "A central premise of immunity debt is that for many infectious diseases, repeat infections are milder than the first infection."

nomel•16m ago
> A central premise of immunity debt is that for many infectious diseases, repeat infections are milder than the first infection.

This is also the fundamental, well understood, mechanism of vaccines and herd immunity [1]: "Immunological memory" [2]. I think that sentence is very irresponsible.

[1] https://en.wikipedia.org/wiki/Herd_immunity

[2] Immunological memory: https://en.wikipedia.org/wiki/Immunological_memory