<prompt> Erythema infectiosum is seen inRubellaFifth diseaseScarlet feverDiphtheria  <response>: Erythema infectiosum also was known as the fifth disease is caused by Parvo Virus B-19.Erythema infectiosumMost common clinical manifestation of human parvovirus infection.Most common complication is arthritisIncubation period is 4 to 14 days.Prodromal illness is minimalCharacteristics skin lesions appear in 3 stages :Ist phase Cheeks are erythematous giving appearance of slapped cheeks.2nd phase Itching erythematous maculopapular rash on extensor surface Palms and soles spared.3rd phase begins to fade and disappears in about 2 weeks. 