Lymphoma and other malignant tumors, such as lung cancer, breast cancer, intestinal cancer, liver cancer, etc., are all non-contagious. Therefore, even if you live with your family every day, you do not have to worry about transmitting malignant tumors to your family members; they are not contagious. When we refer to contagious diseases, we call them infectious diseases, common ones include tuberculosis, hepatitis B, hepatitis C, H1N1, etc. These are contagious diseases, but malignant tumors are not contagious and will not be spread to family members.