"Safe and effective" is an ambiguous term that omits the risk-benefit ratio for each individual. It also does not discuss the risk-benefit ratio given the variant. Indeed, the obese, those over 50, and those with prior health conditions were at highest risk. But what about the young healthy athlete with no existing medical conditions? And what use is vaccination when one already has natural immunity, which is at least as good, if not superior, to protection from vaccination (from a peer-reviewed publication in the Lancet)?