Weak positivity of tuberculosis mainly refers specifically to a weakly positive tuberculin test, and its weakly positive result cannot be used as a diagnostic basis for confirming the diagnosis of tuberculosis. Because some of the weak positivity is also seen in patients who have been vaccinated with BCG vaccine, which produces a normal skin test, showing a weak positive reaction. Clinically, the diagnosis can be confirmed by taking X-rays, CT or MRI of both lungs. Sputum smears are taken to look for or culture Mycobacterium tuberculosis. If necessary, a bronchial fiberoptic endoscopy with biopsies for pathology is also needed to confirm the diagnosis. If the diagnosis of tuberculosis is confirmed, early, combined, moderate, full and regular treatment with anti-tuberculosis drugs, such as isoniazid, rifampicin, ethambutol, pyrazinamide, etc., should be used immediately to achieve a cure.