53 Pa. Stat. § 24661
It shall be lawful for the bureau of health of each of said cities, when it shall have reason to believe from the report in writing of any reputable physician practicing in such cities that any person within the said cities is afflicted with any contagious disease dangerous to the community, to take measures for preventing the spreading of the contagion by forbidding and preventing all communication with the infected house or family, except by means of physicians, nurses or messengers to convey the necessary advice, medicines and provisions to the afflicted person or persons, and exercise all such other powers as the circumstances of the case shall require, and as shall in the judgment of said bureau be most conducive to the public good with the least private injury.
53 P.S. § 24661