Lung adenocarcinoma does not infect family members. Lung adenocarcinoma is a kind of lung cancer and belongs to non-small cell carcinoma. Lung adenocarcinoma is not a contagious disease, the tumor cells of lung adenocarcinoma can only survive in the patient’s body and metastasize and spread, and will not leave the patient’s body actively. Moreover, after leaving the patient’s body, it is easy to die in a short period of time and cannot be transmitted to family members through respiratory, urinary and intestinal tracts, etc. Therefore, there is no need to worry about lung adenocarcinoma patients. Therefore, there is no need to worry that lung adenocarcinoma patients will infect their family members with the disease. However, lung adenocarcinoma has hereditary tendency, so it is recommended that people with family history of lung adenocarcinoma should undergo chest CT and other related examinations regularly. It is suggested that family members of lung adenocarcinoma patients can actively cooperate with doctors to formulate standardized and suitable plans for the patients, and can accompany the patients with peace of mind.