I have been on Entyvio for the last 2+ years. I had a very fast positive reaction with an improvement of symptoms after 1 month. It took longer for the symptoms to completely withdraw. I had no adverse side effects. No extra infections, went through Covid on Entyvio as well with no issues.
I was very hesitant to start the biological treatment, and delayed starting it for years. I see it as a mistake now. I lost few years to Crohn's instead of following Doc's advise. This forum actually helped me make the decision and start the treatment.