I think the drugs just cut off the inflammatory signal, and suspend the immune system's response, includ Infliximab, Humira, Sttelara and so on. But AIEC is still here. After the drug failure, immune system reactive again, symptoms will return. AIEC is existence and bad for us, even if it doesn't exist in each of us. Eliminate it is beneficial at least. So, we need to eliminate them, especially those hide inside macrophages.