While I don't know where the 100,000 number comes from, I believe most of the cases that occur outside Pakistan and Afghanistan are caused by the vaccine. Wikipedia lists those two countries as the only place polio is still endemic. https://en.wikipedia.org/wiki/Polio_eradication#2023

Note to people downvoting this (because maybe they think it’s anti-vaccine crankery). The attenuated polio virus vaccine can cause polio. The reward far outweighs the risk.

Should also be noted that in 2016 the trivalent OPV was replaced with a bivalent vaccine in an attempt to further mitigate the risk [1]:

> Until 2015, over 90% of cVDPV cases were due to the type 2 component in OPV. With the transmission of wild poliovirus type 2 already successfully interrupted since 1999, in April 2016 a switch was implemented from trivalent OPV to bivalent OPV in routine immunization programmes. The removal of the type 2 component of OPV is associated with significant public health benefits, including a reduction of the risk of cases of cVDPV2.

[1] https://www.who.int/news-room/questions-and-answers/item/pol...

Also note that 'attuenated virus vaccine' means the oral vaccine that is prevalent in the developing world, and not the vaccine that, e.g. EU citizens get, I had to look this up, as it is not obvious.

I'm not sure why you've been downvoted for this–maybe a little skittishness after years of anti-vax nonsense—but my understanding is also that you're completely correct and the vast majority of polio infections are vaccine-derived. The oral polio vaccine is (I think?) the only widely-used vaccine where this is a risk, and it's well-known.

> I'm not sure why you've been downvoted for this–maybe a little skittishness after years of anti-vax nonsense

A tangent, but isn't this a problem? We should welcome skepticism, if we can easily refute it: no problem.

Refute or Affirm with further research, not a PR campaign.

> I believe

Why?

"What is vaccine-derived polio?

Oral polio vaccine (OPV) contains an attenuated (weakened) vaccine-virus, activating an immune response in the body. When a child is immunized with OPV, the weakened vaccine-virus replicates in the intestine for a limited period, thereby developing immunity by building up antibodies. During this time, the vaccine-virus is also excreted. In areas of inadequate sanitation, this excreted vaccine-virus can spread in the immediate community (and this can offer protection to other children through ‘passive’ immunization), before eventually dying out.

On rare occasions, if a population is seriously under-immunized, an excreted vaccine-virus can continue to circulate for an extended period of time. The longer it is allowed to survive, the more genetic changes it undergoes. In very rare instances, the vaccine-virus can genetically change into a form that can paralyse – this is what is known as a circulating vaccine-derived poliovirus (cVDPV)."

- WHO

https://www.who.int/news-room/questions-and-answers/item/pol...

That's what Wikipedia says, and I have no reason to doubt it?

We're fully aware the vaccine does cause some polio infections, and the countries that are seeing cases are still in the middle of their vaccination campaigns.

It's a fair statement and question.

Why is it so hard to get clear data on this topic.

Please show me clear data from reputable sources on all of this. It would end a lot of the the vaccine controversy.

Let's take something like tetanus boosters. They are recommended once every 10 years not because you "need" one per se but the cost and expense of running a trial longer than that made it no longer worth the effort.

> Why?

WHO

It's worth noting that by eradicating Polio we can also eradicate vaccine-derived polio, as we'd presumably stop vaccinating people once the disease is eradicated, as we did with smallpox.

The estimate is from 10 years ago, before the consequences of the CIA campaign were known: https://www.jstor.org/stable/26018167.

It's also an opinion piece and the estimate is not a direct quote, so I'm wondering if they might have incorrectly paraphrased what their source told them.

> There were 374 polio cases in 2023

Wikipedia says polio is asymptomatic in 72% of cases, and feels like a mild-ish flu in 24% of cases. So in total 96% of cases are probably not detected at all.

I wonder how long until it's endemic in states like Wyoming, Texas, and South Dakota which have rapidly declining vaccination rates.

> It's also risible to suggest that any of that nonsense has seriously hindered eradication, caseloads in that region remain very low, the hotspots are elsewhere.

It has killed off trust in Western vaccination programs not just in Pakistan but also in Africa and a whole other lot of places. The ripple effects from that have been immense...

There is a reason why the label "medical" should not be abused. The US campaign against Bin Laden, Hamas using hospitals to hide command centers and hostages or as a shooting range, Israeli agents infiltrating a hospital to execute suspected Hamas operatives, German police placing Red Crosses on their medical vans [1]... the list of abuses is long, and at least for war-related action international agreements actually ban that kind of abuse - we're seeing in Palestine right now why.

[1] https://www.l-iz.de/leben/faelle-unfaelle/2021/12/ausgekreuz...

Shouldn't the estimate apply to all vaccine hesitancy in region as the hesitancy would not be limited to Polio vaccines.