evidence: On this day, the Supreme Court rules on vaccines and public health [...] In the face of future public health emergencies like the Coronavirus, a precedential Supreme Court decision about the government’s power to protect citizens by quarantine and forced vaccinations could receive new interest. [...] The Court did not extend the rule beyond the facts of the case before it. Harlan ended his opinion by stating the limitations of the ruling: "We are not inclined to hold that the statute establishes the absolute rule that an adult must be vaccinated if it be apparent or can be shown with reasonable certainty that he is not at the time a fit subject of vaccination or that vaccination, by reason of his then condition, would seriously impair his health or probably cause his death."