Recurrent viral infection: an annotation.
D002644:Chickenpox / Q000209:etiology; D003586:Cytomegalovirus Infections / Q000209:etiology; D006566:Herpesviridae Infections / Q000209:etiology; D006801:Humans; D008587:Meningitis, Viral / Q000209:etiology; D012008:Recurrence; D012409:Rubella / Q000209:etiology; D012899:Smallpox / Q000517:prevention & control; D014777:Virus Diseases / Q000209:etiology*