The Unclean Are Removed out of the Camp

Numbers 5:2 Command the children of Israel, that they put out of the camp every leper, and every one that hath an issue, and whosoever is defiled by the dead:

Of all diseases known in the East the leprosy was most dreaded. Its incurable and contagious character, and its horrible effect upon its victims, filled the bravest with fear. Among the Jews it was regarded as a judgment on account of sin, and hence was called "the stroke," "the finger of God." Deep-rooted, ineradicable, deadly, it was looked upon as a symbol of sin. By the ritual law, the leper was pronounced unclean. Like one already dead, he was shut out from the habitations of men. Whatever he touched was unclean. The air was polluted by his breath. One who was suspected of having the disease must present himself to the priests, who were to examine and decide his case. If pronounced a leper, he was isolated from his family, cut off from the congregation of Israel, and was doomed to associate with those only who were similarly afflicted. The law was inflexible in its requirement. Even kings and rulers were not exempt. A monarch who was attacked by this terrible disease must yield up the scepter, and flee from society. {DA 262.1}
Away from his friends and his kindred, the leper must bear the curse of his malady. He was obliged to publish his own calamity, to rend his garments, and sound the alarm, warning all to flee from his contaminating presence. The cry, "Unclean! unclean!" coming in mournful tones from the lonely exile, was a signal heard with fear and abhorrence. {DA 262.2}