Leviticus 15:28 Commentary - Ellicott's Commentary for English Readers (Old and New Testaments)

(28) But if she be cleansed.—That is, cured or healed of her infirmity. The expression “cleansed” is used both here and in Lev. 15:13 for the disappearance of the complaint. From the time of its cessation she is to count seven days, during which no trace of the complaint must be observable, just as in the case of the less innocent disorder. (See Lev. 15:13.)

After that she shall be clean.—That is, after having performed the rites of lustration.