Parashas Metzora · Passuk 15:13
Chabad.org — English translation + Rashi
Torah Temima points to Megillah 8a.
English: “From his flux” — from his flux, and not [necessarily only after he is also pure] from his flux and from his nega.
Independent counting for zav who is also metzora
Chazal allow a zav who is also a metzora to begin counting seven clean days for zivah as soon as the flux stops, without waiting for full recovery from tzaraas.