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> These are the important bits for the non medical folks

Also significantly: "vaccinated individuals consistently had a lower risk of death, regardless of the cause."

that in itself could be healthy user bias (if a healthier subset was taking up the vaccine).

did they control for that?

Its a cohort study, so you can only control for confounders. The 2nd paragraph of the discussion addresses the healthy-vaccinee effect you're referring to.

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