<s>[INST] Is there a vaccination against TB? [/INST] Yes, the BCG (Bacille Calmette-Guérin) is a weakened strain of TB bacteria which builds up immunity, and encourages the body to fight TB if infected. Although the BCG gives some people protection against TB, it cannot prevent everyone who comes into contact with the bacteria from getting ill.

The BCG vaccination is thought to protect up to 80% of people for a maximum of 15 years and is not generally given over the age of 35.

Until a better vaccine is developed the best way to prevent TB is to make sure people know the symptoms so they can visit a doctor and get diagnosed and treated as early as possible. Source: THE TRUTH ABOUT TB. Link: https://www.thetruthabouttb.org/talking-tb/questions-answers/. Field: Lung Disease. Disease: Tuberculosis </s>