Is blood and pus ritually impure?

Question:
The questioner asks: Do blood and pus invalidate the ablution or make clothes ritually impure? What is the ruling regarding the residue left from them?

Answer:
Yes, if blood is abundant, it must be washed. As for a few drops, they are excused, though washing them is better. The same applies to pus: a small amount is excused, and if one performs ablution with it, that is good, and washing it is good, because there is scholarly disagreement regarding the sitting [posture]. As for a few drops of pus, yellow discharge, or blood that hit the garment or a part of the body, a small amount is excused. It may come from a nosebleed, a wound, or an eye injury, or something similar. If it is a small amount, it is excused. Yes. And the residue remaining after the prayer. Its washing is the legally prescribed washing, and the residue does not cause harm. However, one should wash it with soap or the like until it is removed. If it is found that it has not been removed, it does not cause harm.