Infusion and serious allergic reactions can happen during or after treatment. entyvio may increase risk of infection, which can be serious. pml, a rare, serious, potentially fatal brain infection caused by a virus may be possible. tell your doctor if you have an infection, experience frequent infections or have flu-like symptoms or sores. liver problems can occur with entyvio. ask your doctor about the only gi-focused biologic just for ulcerative colitis and crohn's. entyvio. relief and remission within reach. ♪ steve: fireworks erupting yesterday on capitol hill as acting director of nation...