en_tn/lev/13/15.md

The priest must ... pronounce him unclean because the raw flesh is unclean

The man whom other people must not touch is spoken of as if he were physically unclean. (See: rc://en/ta/man/translate/figs-metaphor)

pronounce him unclean

Here "him" refers to the person with the skin disease.

raw flesh

See how you translated these words in Leviticus 13:10.

infectious disease

See how you translated these words in Leviticus 13:3.