1. Vaccination with BCG, mainly for newborns, children and adolescents, can reduce the incidence rate by about 80%, and its protective power is maintained for about 5 years. Positive PPD test after 6-8 weeks of inoculation, indicating that the body has gained immunity to tuberculosis bacteria. 4 years later, and then do the PPD test, if negative need to re-vaccination; 2, adhere to physical exercise, more outdoor activities, more contact with the sun, fresh air, improve the body’s ability to resist disease; 3, increase nutrition, avoid eating hairy food; 4, to maintain a happy spirit, emotional relief; 5, to prevent upper respiratory tract infections, pay attention to oral hygiene If you find rhinitis, pharyngitis, tonsillitis, dental caries should be treated early to prevent secondary tuberculosis infection.