If you have a reaction it will happen during the infusion. In 4 years of getting infusions in the so called “Remicade Room” in Guilford, CT, usually getting infused with 3 other patients at a time, I have witnessed only one reaction and it happened within the first half hour of that person’s infusion. I would estimate I have witnessed, just doing the math, at least 150-175 other persons infused with no reaction. So from my experience it was 1 out of 150-175.
The reaction will most likely abate as soon as the infusion is stopped.