The liberty secured by the Constitution of the United States does not import an absolute right in each person to be at all times, and in all circumstances, wholly freed from restraint. […] Upon the principle of self-defense, of paramount necessity, a community has the right to protect itself against an epidemic of disease which threatens the safety of its members. […] In every well ordered society charged with the duty of conserving the safety of its members the rights of the individual in respect of his liberty may at times, under the pressure of great dangers, be subjected to such restraint, to be enforced by reasonable regulations, as the safety of the general public may demand.

John Marshall Harlan (1833-1911) American lawyer, politician, Supreme Court Justice (1877-1911)

Jacobson v. Massachusetts, 197 U.S. 11 (20 Feb 1905) [majority opinion]
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