Positive Mitzvah 104
Impurity of a "Zav"
Leviticus 15:2 "When any man has a running discharge of his flesh..."
Zav is a state of impurity that may befall a man.
Positive Mitzvah 96
Impurity of a Dead Animal
Leviticus 11:8 "And their carcasses you shall not touch"
Contact with the dead body of an animal that was not ritually slaughtered makes one impure.