Can BCG Treatments Cause Tuberculosis?

BCG (Bacillus Calmette-Guérin) is a vaccine used to prevent tuberculosis (TB), not cause it. BCG is made from a weakened form of the bacteria that causes TB in cattle. When administered as a vaccine, it helps the immune system build a defense against TB.

However, BCG can cause a positive reaction to a TB skin test. This doesn’t mean you have active TB; it’s a sign that you’ve been vaccinated or have been exposed to TB in the past. BCG is primarily used in countries with a high prevalence of TB or for individuals at high risk of exposure to the bacteria. If you have concerns about TB or BCG, it’s best to consult with a healthcare professional for personalized information.