<prompt> After hepatitis B vaccination child with allergic family history and pruritis involving face convexities developed numerous umblicated vesicles; which became pustular haemorhagic crusted. After 2 days child developed high fever and lymphadenopathy. The diagnosis isSecondary infected atopic dermatitisMolluscum contagiosumEczema herpaticumEczema vaccinatum  <response>: Eczema herpeticum or Kaposi;s varicelliform eruption results from wide spread usually primary HSV- 1 herpes simplexl infection in skin damaged by atopic dermatitis eczemaQ. Patients with atopic eczema may develop severe orofacial herpes simplex virus HSV infectionQ eczema herpaticum, which may rapidly involve extensive areas of skin occasionally disseminate to visceral organs. Systemic acyclovir or valaciclovir is treatment of choice. In atopic dermatitis patients, small pox vaccination or even exposure to vaccinated individual, may cause severe wide spread erruption ka eczema vaccinatum that resembles to eczema herpaticum. Kaposis varicelliform eruptions manifest either as - eczema herpeticum or eczema vaccinatum Ref : Thomas b Habif 6th Ed. 