Refractory Celiac Disease (RCD) is not contagious. It is an autoimmune condition where the immune system mistakenly attacks the lining of the small intestine when gluten is consumed. RCD is a rare and severe form of celiac disease that does not respond to a gluten-free diet. It requires medical intervention and management by healthcare professionals. It is important to consult with a healthcare provider for proper diagnosis and treatment of RCD.