You're on the money. People as a group are constantly having transient health related stuff. Reporting all of those when they occur a few days or weeks after so

You're on the money. People as a group are constantly having transient health related stuff. Reporting all of those when they occur a few days or weeks after someones been vaccinated is no different than snapping a picture with a camera. One thing that bothers me is composing health events after vaccination with the base rate of those events. Those are no the same because in the former there is an known event. In the latter we don't capture the triggering events. Like perhaps both vaccination and the flu in young males causes mild heart inflammation. The base rate for flu related heart inflammation will be proportional to the percentage of males that get the flu per unit time. A small fractional number. Where when measuring after vax, 100% were vaxed.