Being up-to-date on your immunizations is important in order to minimize vaccine-preventable illnesses, such as influenza, pneumococcal pneumonia, and hepatitis B. Treatment with an immunosuppressive agent places IBD patients at increased risk for developing vaccine-preventable illnesses.
The vast majority of children and adults who have Crohn’s disease and ulcerative colitis will likely be treated with immunosuppressive medications at some point in the course of their disease, either in the short term to induce remission (such as with a course of corticosteroids) or in long-term maintenance therapy (such as with immunomodulators or tumor necrosis factor inhibitors). 
MyIBD provides a tool to follow and record your immunization records as well as cancer screenings.
 Rufo PA, Bousvaros A. Current therapy of inflammatory bowel disease in children. Paediatr Drugs. 2006;8(5):279–302