How long it takes to go to work for secondary tuberculosis treatment is related to the duration of the treatment. Secondary tuberculosis includes infiltrative tuberculosis, cavitary tuberculosis, fibrocavitary tuberculosis, and caseous tuberculosis, etc. The treatment cycle is different for different types of tuberculosis. TB is a contagious disease and it is important to make sure that it is not contagious after treatment before going to work. For infiltrative TB and cavitary TB, more than nine months of treatment is needed under standardized treatment, and sputum culture needs to be repeated after treatment; if the sputum culture results of tuberculosis bacilli are negative for three consecutive times, you can go to work. For fibro-cavitary tuberculosis, tuberculosis is prone to recurrence after treatment, which requires a longer period of time, the treatment should last at least one and a half years, and sputum culture is negative, you can go to work. For caseous pneumonia, tuberculosis bacilli inside the lungs, usually need at least six months of treatment, after treatment still need to check whether there are still tuberculosis bacilli in the sputum, the result is negative can go to work. After infected with tuberculosis must promptly seek medical treatment, take standardized treatment strategy, so as to avoid infecting others.