Prostate cancer is non-contagious; it is a non-infectious malignant tumor, and it generally does not transmit to others, meaning there is no risk of contagion. Thus, when caring for patients with malignant tumors, including those with prostate cancer, there is no need to worry about contagion. Clinically, many family members also inquire about this issue, concerned about the possibility of infection. Malignant tumors are non-infectious. Infectious diseases refer to conditions such as chronic hepatitis B and tuberculosis, among other contagious diseases. Malignant tumors are not contagious.