What is the typical range of the incubation period before active tuberculosis develops after initial infection?

- The incubation period of tuberculosis (TB) is typically variable, ranging from weeks to years after initial infection.
- Following inhalation of Mycobacterium tuberculosis, the majority develop latent TB infection, which can remain dormant for prolonged periods.
- Active disease may develop within weeks to months if the immune response fails or can reactivate decades later when immunity wanes.
- This variability reflects the complex interaction between host immunity and bacterial factors.
- Therefore, the correct answer is weeks to years.

Reference: Davidson’s Principles and Practice of Medicine, 23rd Edition, Chapter: Pulmonary Tuberculosis, Page 1136.