Lung cancer patients can be vaccinated when their immune function is normal and they are not under treatment, but it still needs to be judged according to the patient’s physical condition and the degree of cancer development. Vaccination mostly belongs to active immunization, which refers to injecting attenuated or inactivated pathogens into the body to stimulate the immune system to produce corresponding antibodies. Therefore, vaccination and its subsequent effects require that the vaccinated person has basic immune function and immune health. Patients with mild lung cancer, those who are not undergoing treatment, or those who do not have extensive damage to their own immune function can be vaccinated. Vaccination is not recommended for lung cancer patients in advanced stages of the disease or during recovery from surgery, radiotherapy or targeted therapy. Lung cancer patients at this stage will have obvious immunocompromise or immune damage, so the vaccine may cause serious adverse reaction or pathogen infection after entering the body, which will cause certain damage to the patient’s body. Whether lung cancer patients can be vaccinated or not, it is recommended to consult doctors and make a judgment based on their own physical conditions.