C-globulin refers to gamma globulin, the use of which allows vaccination against BCG. Gammaglobulin can interfere with the vaccination against the disease in question if it contains antibodies to the disease in question. Since gammaglobulin is extracted from human blood, and basically all of us in the country have been vaccinated against measles or naturally infected with measles at present, the blood may contain antibodies to the measles virus, and it is not possible to receive vaccines containing measles components after administering gammaglobulin. Since BCG vaccine does not contain measles, it is possible to receive BCG vaccine after gammaglobulin without affecting the effectiveness of BCG vaccine. If a vaccine containing measles components, such as measles vaccine, is needed, it should be injected after the antibody has been consumed. Patients are advised to inform the doctor of their medical and medication history before vaccination and follow the doctor’s instructions for vaccination.