"Vaccines are one of the safest medical treatment" is a common assumption.

It's an assumption based on the idea that

-the studies are well-designed

-negative effects are reported

-negative effects that *are* reported change the marketing trajectory

None of these things are true. I'm not sure we'll ever know how safe different vaccines are.

(And that's leaving aside the absurdity of grouping all things that companies label "vaccine" into one category and defending that entire category regardless of adjuvants used, length of specific safety trial, etc.)