Recurrent viral infection (reinfection).
D002648:Child; D002908:Chronic Disease; D003586:Cytomegalovirus Infections; D004769:Enterovirus Infections; D006506:Hepatitis A; D006561:Herpes Simplex; D006562:Herpes Zoster; D006801:Humans; D008457:Measles; D008587:Meningitis, Viral; D009107:Mumps; D012409:Rubella; D014615:Vaccinia; D014777:Virus Diseases / Q000145:classification / Q000175:diagnosis / Q000276:immunology