Tuberculosis or TB is a very serious bacterial infection that mainly affects the lungs of an individual and can potentially prove to be fatal if not diagnosed and treated during its early stages. TB is also a very contagious disease that can spread through tiny droplets in the air from coughs and sneezes from an infected person.
TB has three stages:
1. Exposure: The bacteria enter the body of the individual in the first stage.
2. Latent: The bacteria lie latent in the body of the patient and slowly infects the patient
3. Active Disease: The disease fully develops inside the lungs of the patient, which turns him into a host.