Transmission

• spread through aerosols created by coughing or sneezing
• infectious dose is very low where the inhalation of a single bacterium can cause a new infection
• People with prolonged or frequent contact are at high risk of being infected with an estimated 22% infection rate.
• Those who are at risk of contracting TB:

1. People who inject drugs using unsanitary needles.
2. People in areas where TB is common
3. Immunocompromised patients
4. Residents and employees of high-risk congregate settings

• Transmission can only occur from people with active Tuberculosis