of Health, A state's police power to enforce quarantine laws extends to restricting the movements of uninfected individuals. Jacobson v. Massachusetts, Individual liberty is not absolute, and a state's police power must be held to embrace at least such reasonable regulations established directly by legislative enactment to protect public health and safety, which extends to compulsory vaccination laws. Zucht v. King, School districts can constitutionally exclude unvaccinated students. Prince v. Massachusetts, States have broad authority to regulate the actions and treatment of children. Parental authority is not absolute and can be permissibly restricted if doing so is in the interests of a child's welfare. While children share many of the rights of adults, they face different potential harms from similar activities. Compulsory vaccination is an example of a fundamental police power. Buck v. Bell State statutes permitting compulsory sterilization of the unfit, including the intellectually disabled, "for the protection and health of the state" did not violate the Due Process Clause of the Fourteenth Amendment. (partially overruled by Skinner v. Oklahoma (1942) and fully by the Americans with Disabilities Act of 1990) Other areas Corfield v. Coryell, 6 Fed. Cas. 546 (C.C.E.D. Pa. 1823) Some of the rights protected by the Privileges and Immunities Clause include the freedom of movement through the states, the right of access to the courts, the right to purchase and hold property, an exemption from higher taxes than those paid by state residents, and the right to vote. This case was decided by Supreme Court Justice Bushrod Washington while riding circuit in the Circuit Court for the Eastern District of Pennsylvania. It is notable for Washington asserting the existence of cognizable rights within the ambit of the Privileges and Immunities Clause that are nowhere within the Constitution's text. Ex parte Milligan, Trying citizens in military courts is unconstitutional when civilian courts are still operating. Trial by military tribunal is constitutional only when there is no power left but the military, and the military may validly try criminals only as long as is absolutely necessary. Reid v. Covert, United States citizens abroad, even when associated with the military, cannot be deprived of the protections of the Constitution and cannot be made subject to military jurisdiction. Criminal law Fourth Amendment rights Weeks v. United States, Exclusionary rule, under which evidence obtained in violation of the Constitution cannot be admitted at trial, formulated for federal prosecutions. Silverthorne Lumber