[lfmhd]

There IS scrutiny on vaccines, by the scientific and medical community - your "scrutiny" (as presumably neither a PhD in a relevant field or MD) is not valuable or relevant. There is decades of research that says that currently recommended vaccines are safe and effective.

[SoftTalker]

And the anti-vax crowd was a minority fringe until recently (they still pretty much are but they have some new vocal proponents now). The politicization, lies, and misinformation about the COVID vaccine in particular really damaged decades of trust that had been built.