b, Nol.tim., ex hoc jam eris homines vivificans.
In passing to the incident of the leper, Tertullian argues that the prohibition of contact with a leper was figurative, applying really to the contact with sin.

But the Godhead is incapable of pollution, and therefore Jesus touched the leper.

It would be in vain for Marcion to suggest that this was done in contempt of the law.

For, upon his own (Docetic) theory, the body of Jesus was phantasmal, and therefore could not receive pollution: so that there would be no real contact or contempt of the law.

Neither, as Marcion maintained, did a comparison with the miracle of Elisha tend to the disparagement of that prophet.