In clinical practice, a positive TB blood test means a positive T-SPOT test by blood, indicating infection with Mycobacterium tuberculosis. However, from a positive result, it is not possible to tell alone whether the infection is a previous infection or a recent infection with Mycobacterium tuberculosis at present. If the positive result is strongly positive, it can be considered as active TB, which is currently developing, and the patient has a relatively high concentration of Mycobacterium tuberculosis in his body. There are other clinical tests that should be performed in combination to clarify the condition and cause, such as a CT of both lungs or even an MRI, and if necessary, sputum to look for antacid bacilli. If they are all positive, it means that the tuberculosis is active and should be treated with standardized combination of anti-tuberculosis drugs.