- Any current or expected receipt of immunosuppressive agents including steroids (2 mg/kg per day of prednisone or its equivalent, or equal to or greater than 20 mg/day if the subject weighs >10 kg, given daily or on alternate days for equal to or greater than 14 days); children in this category should not receive study vaccine until immunosuppressive agents including corticosteroid therapy have been discontinued for equal to or greater than 30 days; the use of topical steroids is permitted according to the judgment of the investigator