**Post-primary** or secondary tuberculosis occurs simultaneously with the initial disease. At the site of the primary and secondary disease, the tissue remains completely homogeneous, the tissue remains unchanged; in both cases the lymphatic vessels do not function in the same way; and in both cases no abscess formation occurs. It differs from its earlier chronic variant only in the nature of the primary process itself - it becomes more often one-sided, but the simultaneity of the primary and secondary lesions is often observed (in adults, and even more so in children). Also, secondary tuberculosis can occur when the primary process has undergone self-healing. A tertiary outbreak, another name for a secondary outbreak, often appears immediately after infection, but does not appear immediately - it takes several weeks. Often, primary lesions disappear before the active tuberculosis process develops. Therefore, by the time the disease becomes apparent, traces of the tuberculin test are already present in the body. This is due to the fact that the human body spends quite a lot of energy on inflammation of the wound from which the infection occurred.