Tuberculosis vaccine can be used to prevent tuberculosis, BCG vaccine is used to prevent tuberculosis vaccine, but BCG vaccine is mainly used for infants and young children, adults are usually not inoculated, as follows: 1, infants and young children: when infants and young children inoculated with BCG vaccine after the body of Mycobacterium tuberculosis specific resistance, thus preventing Mycobacterium tuberculosis in the body of the dissemination of propagation, reproduction, etc. In addition, BCG can reduce the incidence of severe tuberculosis infection. In addition, BCG vaccine can also reduce the incidence of severe tuberculosis infection.2. Adults: usually do not receive BCG vaccine, because the preventive effect of adult BCG vaccination is not good. In addition, BCG vaccine can not do 100% to avoid the infection of tuberculosis bacillus. At this time, the focus for tuberculosis is to strengthen the prevention, such as strengthening the body’s resistance, timely detection of tuberculosis patients, and to control the treatment, so as to better reduce the risk of tuberculosis infection.