this post was submitted on 20 Feb 2026
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[–] boydster@sh.itjust.works 54 points 1 week ago* (last edited 1 week ago) (15 children)

The approach described in the journal Science does not train the immune system. Instead it mimics the way immune cells communicate with each other.

It is given as a nasal spray and leaves white blood cells in our lungs – called macrophages – on "amber alert" and ready to jump into action no matter what infection tries to get in.

The effect lasted for around three months in animal experiments.

[–] DaddleDew@lemmy.world 69 points 1 week ago (9 children)

I'm no immunologist, but there has to be a reason why we evolved so our immune system doesn't constantly stay on "amber alert". There has got to be drawbacks.

[–] veroxii@aussie.zone 2 points 1 week ago

Sure. You wouldn't want it all the time. Aside from auto-immune issues even simple things like allergies might be worse

But if we think of it as a booster it could be useful. Someone in the household comes down with something, then everyone else does a quick squirt with the immu-alert nasal spray.

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