<qa>  What is the HIV?1.5. Screening tests positive for Human Immunodeficiency Virus HIV, active Hepatitis B Virus HBV, Hepatitis C Virus HCV 1.6. Chronic use of i immunosuppressive drugs, ii antibiotics, iii or other immune modifying drugs within three months prior to study onset inhaled and topical corticosteroids and oral anti-histamines exempted or expected use of such during the study period. 