Also it's more like 1 in 100K for women with AZ. Still very unlikely so I don't understand the need for people to under state it by 10x.

From Science Table Covid-19 Advisory board to Ontario: https://covid19-sciencetable.ca/wp-content/uploads/2021/04/S...

Which is the newest I could find on that matter.

> VIPIT seems to be rare, occurring in anywhere from 1 in every 125,000 to 1 in 1 million people

So, 1 in 100K seems to be the number to be on the safe side. But with rather rare events, it is probably hard to get an exact number there.

If I'm reading the source used by that link correctly though, the 1 million number comes from taking total number vaccinated as the denominator. My understanding was if you are a young woman, the estimate is closer to 1 in 100K. If you aren't it's probably even less likely than 1 in a million.