Recombinant interleukin 2 (rIL2) was administered to a patient with Wiskott-Aldrich syndrome for the treatment of an intractable facial herpetiform lesion. This treatment appeared to be effective in suppressing the virus activity. At the same time, a transient improvement of the chronic eczematoid dermatitis was observed. During rIL2 administration, the CD3+ and CD4+ subsets of peripheral blood lymphocytes increased in number. These changes might play an important role in the induction of anti-viral immunity and in the improvement of dermatitis.