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Definition of Pseudorubella
Medically reviewed by Min Clinic Staff | Updated: January 2026
Pseudorubella: Synonymous with Roseola infantum, a viral disease of infants sudden onset of high fever which lasts several and young children with days and then suddenly subsides leaving in its wake a fine red rash. The causative agent is herpesvirus type 6 so the disease is known as Sixth Disease. Also as Exanthem subitum (sudden rash), roseola, roseola infantilis.