Lung cancer patients can receive booster vaccination when their condition is stabilized. If they have completed two doses of inactivated CKV vaccine and the second dose is six months old, it is recommended to receive CKV booster vaccine in time to achieve the purpose of strengthening immunization. Whether lung cancer patients can receive booster vaccination depends on the actual situation of individuals, if the disease is in a stable stage, they can generally receive booster vaccination. However, if the lung cancer patient’s condition is in acute exacerbation or progressive stage, or if the patient is undergoing anti-tumor treatment, he/she should not receive the booster vaccination, so as not to aggravate his/her condition or affect the effect of the vaccination. Lung cancer patients who want to receive the booster vaccine should consult a professional physician before vaccination and decide whether to receive the vaccine after the physician’s evaluation. Individuals should know the contraindications and indications of the vaccine before receiving the vaccine, and should only consider receiving the vaccine if it is not contraindicated.