On: Universal flu vaccine against all known subtypes takes promising first steps

[HPsquared]

Not with humans, but it has happened in chickens.

https://en.m.wikipedia.org/wiki/Marek%27s_disease#Prevention

It seems to be related to "leaky" vaccines.

[JumpCrisscross → HPsquared]

Interesting. Curious why we haven’t seen a similar effect with SARS-CoV-2 or the poliovirus.

[Izkata → JumpCrisscross]

IIRC it took about 20 years to be apparent with Marek's disease.

The polio vaccines aren't "leaky", but we are seeing increasing problems with oral-vaccine-derived polio now: https://www.who.int/emergencies/disease-outbreak-news/item/2... - there are more cases of this than of "wild" polio nowadays.

[JumpCrisscross → Izkata]

> polio vaccines aren't "leaky"

Non-sterilising polio vaccines prevent illness but not infection and re-transmission. OPV is the one that sterilises.