The law of the Tzaruah - leper parallels the law of Gezel Hager. Both of them comprise the legal institution that proclaims the presence of G-d in the social relationships of the nation. The second law mentioned is the Zav someone with a genital infection having to leave the middle encampment, the Levite camp. This parallels the law of Sotah the accused adulterer. The middle camp represents the sanctity and integrity of the family unit.
Sexuality is an exclusive component of the family unit represented by a husband and wife.
All other forms of sexual expression are forbidden. Therefore, an individual suffering from a genital infection must leave the inner camp symbolizing the sanctity of sexuality and family. The Sotah is a tragic circumstance where the basic unit of the family has been infected with jealously, accusation, and possible betrayal. The laws of the Zav and the Sotah comprise the legal institution that proclaims the presence of G-d in the sexual purity of the family. The third law mentioned is Taameh Lanefesh someone who came in contact with a dead body having to leave the inner encampment.