In September 2025, Florida became the first state to end all vaccine mandates for schoolchildren, and the United States Department of Health and Human Services Secretary Robert F. Kennedy Jr. announced an overhaul of the approach to vaccination in America. This booklet provides the bedrock philosophical and theological truths which prove that both Florida and RFK Jr. are doing the right thing, and that all other states, agencies, and institutions should quickly follow suit. Although an academic work, this booklet is written in such a way that the average reader will have no problem following its urgent message. *** Universal moral obligations exist only when reason can and does establish that natural or Divine Law mandate some course of action. This booklet proves that purely preventive medical interventions—nontherapeutic acts of the medical industry as such (e.g., vaccination), aiming to circumvent a possible future pathology in the healthy—belong to a category which cannot generate these obligations. Therefore, they also cannot be civilly mandated. This booklet also responds to recent Catholic scholarship that has misconstrued magisterial teaching on vaccination and the nature of conscience.