When the Paschal sacrifice was offered in a state of impurity, it should also be eaten in a state of impurity, for from the outset, it was brought only to be eaten. It may not be eaten by all those who are impure, only by those impure because of contact with a human corpse. For them, this impurity is suspended. This also applies to those impure because of contact with other sources of impurity.
Those who are impure because of an impurity that results from a physical condition, e.g., zavvim, zavot, niddot, women after childbirth, those afflicted by tzara'at, should not partake of it. If, however, they do partake of it, they are exempt. According to the Oral Tradition, we learned that when a sacrifice is eaten by those who are pure, those who are impure are liable for partaking of it in impurity. When it is eaten by those who are impure, there is no liability for partaking of it in impurity. Even if those who are impure because of contact with a human corpse partook of the fats and organs to be offered on the altar, they are exempt.
When does the statement that a Paschal sacrifice may be eaten while ritually impure apply? When the people became impure before the blood was poured on the altar.If, however, they became impure after the blood was poured, it should not be eaten.