تعريف sixth disease في الإنجليزية الإنجليزية القاموس.
(Tıp, İlaç) Roseola infantum (exanthema subitum, sixth disease, Zahorsky's disease) is a benign viral endemic illness of infants and young children, caused by human herpesvirus 6 (of which there are two strains, A and B) and possibly by herpesvirus 7. It is characterized by abrupt, high, sustained or spiking fever, mild pharyngitis, and lymph node enlargement