Tuberculosis is the most common form of tuberculosis, which has a slow and insidious onset and requires a high degree of vigilance for early diagnosis. For example, people who have cough or sputum for more than two weeks, have chronic low-grade fever, or have a history of close contact with open tuberculosis are recommended to go to the hospital for a screening test. The screening test can be chest X-ray, chest CT, PPD test or gamma-interferon release test. If you have coughing sputum, you can also send sputum examination and sputum for antacid bacilli or culture of tuberculosis bacilli, which will facilitate the early diagnosis of tuberculosis.