What happens after exposure to TB?

After getting exposed to the TB bacteria, a couple of scenarios can happen. Some people may develop active TB soon (within weeks).  In others, the bacteria lays dormant.  This is the latent phase of infection.  There’s a 5-10% chance of developing an active infection without treatment.  The highest chance for developing the infection is within the first 1-2 years after getting the bacteria.  This chance decreases if you take treatment for Latent Tuberculosis Infection.