- Participant has known or suspected congenital or acquired immunodeficiency (including leukemia, human immunodeficiency virus [HIV] seropositivity), has received immunosuppressive therapy (such as cyclosporine, anti-cancer chemotherapy, radiation therapy, or cytotoxic drugs) within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent) for more than 2 consecutive weeks within the past 3 months, or has chronic active hepatitis B or hepatitis C infection, documented by hepatitis B surface antigen (HBsAg) and hepatitis C antibody, respectively