<qa>  What is the name of the antibody?Crohns disease is a disease characterized by inflammation the changes that happen when tissues in the body are injured and ulceration formation of pus of the bowel. The purpose of this study is to investigate the safety and therapeutic effect of two different doses of an anti-TNFα tumor necrosis factor antibody a protein given multiple times compared to a single dose followed by placebo inactive substance. The name of the antibody is infliximab Remicade The goal of the study is to evaluate whether patients respond longer to a single dose of infliximab or to repeated doses of infliximab. 