Which are controversial in some circles because they're a rare example of a "get out of jail free" card for big companies. (I'm not agreeing with that POV but noting that it's pretty widespread.)

I actually agree that vaccines (and really drugs more broadly) are a rather unusual example of products that can be used as directed and things can still go bad--without the manufacturer necessarily being "at fault." [Edit: Where it's not the fault of the user or other human.]