והובא אל אהרן הכהן או אל אחד מדוין הכהנים
The Torah authorizes only the Kohen to pronounce a plague as Tzaraas. Only the Kohen can render a plague tamei, spiritually impure. Chazal (Mishnah Negaim 3:1) teach that all are fit to view or diagnose a nega. Only a Kohen can make the pronouncement of tamei or tahor. If a Kohen is (sadly) not knowledgeable in the laws pertaining to Tzaraas, we seek a talmid chacham, Torah scholar, who is proficient in recognizing the purity or impurity of a given plague, and he instructs the Kohen concerning what pronouncement to make. The Tolna Rebbe, Shlita, quoted his grandfather Horav David,…