Gary - not exactly sure what you are asking? Are you looking forosmehting to help boost your immune system? The most important thing when taking Remicade, according to my doctor, is to make sure you wash your hands, and keep things clean - try to reduce the spread of germs. While some people have different levels of suppression in immunity to particular things, (read the literature, histoplasmosis for example) - I for one haven't been any sicker than anyone else in my family - in fact I'm usually healthier!