- Vaccines: Subjects who received any live virus or bacterial vaccinations other than bacille Calmette-Guerin (BCG) within the 3 months before the first administration of the study agent, or are expected to receive any live virus or live bacterial vaccinations during the study, or up to 3 month after the last administration of ustekinumab are not eligible. Subjects who received BCG vaccines within the 12 months before the first administration of the study agent, or are expected to receive BCG vaccines during the study, or up to 12 month after the last administration of ustekinumab are also not eligible.