Ovarian cancer is not contagious, so it does not spread through bodily fluids, the blood or respiratory tract of the patient, or sexual activity. It will not transmit to others via these routes. Malignant tumors are not contagious. The diseases we commonly refer to as contagious are called infectious diseases, which typically include, for example, tuberculosis and epidemic influenza, which can spread to others via the respiratory tract. Additionally, chronic hepatitis B is a contagious disease that can be transmitted through blood or other body fluids. Ovarian cancer, however, is not contagious and will not spread to others.