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Acute graft versus host disease is a condition in which the graft versus host reaction occurs in the first 3 months of the transplant procedure.Usually it appears in the first 2-4 weeks following transplant.Acute graft versus host disease is characterized by erythematous[reddish] maculopapular skin lesions

Sinus infection lasting for months or years is called chronic sinusitis.Majority of the cases of acute sinusitis occurs due to failure of the acute infection to resolve.