Time and experience have forcefully taught that the power to inspect dwelling places, either as a matter of systematic area-by-area search or, as here, to treat a specific problem, is of indispensable importance in the maintenance of community health; a power that would be greatly hobbled by the blanket requirement of the safeguards necessary for a search of evidence of criminal acts.

Frank v. Maryland, 359 U.S. 360, 372 (1959); majority opinion in 5-4 ruling that allowed health inspectors to enter a private home without a search warrant (May 4, 1959). - Judicial opinions