<qa>  What is the negative for HBV surface antigen?Subjects positive for HBV surface antigen HBsAg at screening will be excluded Subjects negative for HBV core antibody anti HBs but positive for anti HBc negative HBsAg status and positive for HBV deoxyribose nucleic acid DNA will be excluded; however, subjects positive for anti HBc negative HBsAg status and positive for anti HBs past andor current evidence are immune to HBV and will not be excluded 