- Presently receiving or history of receiving, during the preceding 3-month period, any medications or other treatments that may adversely affect the immune system: This includes allergy injections, immune globulin, interferon, immunomodulators, cytotoxic drugs or other drugs known to be frequently associated with significant major organ toxicity, or systemic corticosteroids (oral or injectable); Inhaled and topical corticosteroids will be allowed