 4. Has known or suspected congenital or acquired immunodeficiency, or recent history or current use of immunosuppressive therapy Anti-cancer chemotherapy or radiation therapy within the preceding 6 months, or long-term at least 2 weeks within the previous 3 months systemic corticosteroids therapy at a dose of at least 0.5 mgkgday. Intranasal or topical prednisone or equivalent is allowed. 