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For infection rates, perhaps there is a bit of a confounding factor of vaccinated people being less careful (eg unmasking) due to confidence in their vaccination status?

The deaths by vaccination status stats on that same page are pretty interesting.

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My thought on the most likely confounding factors is both requirement and proclivity to get tested. Vaccinated/boosted folk are more likely to be in situations requiring testing, thus finding more mild or asymptomatic cases. I'm not sure on who is more likely to get tested of their own volition for mild symptoms and could see arguments both ways, but could see it being a factor.

Agreed, the deaths by vaccination status shows a stronger benefit, particularly with age.

The mrna vaccines have an impact on transmission / infection of omicron for about 4-6 months (there is longer-lasting protection against severe illness etc).

This leads to very confusing debates, the "headline" stats used to sell the vaccine demonstrate high effectiveness (they tend to use data from the 4-6 month window where they know it will look good).

The metastudies / long-term studies tell a more nuanced story.

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