How long does the tuberculosis vaccine last in California?

The tuberculosis vaccine, known as the Bacillus Calmette-Guérin (BCG) vaccine, is not commonly used in the United States, including California, due to the low incidence of tuberculosis. When administered, the BCG vaccine may provide some protection, but its effectiveness can vary, and it does not guarantee lifelong immunity. Generally, the vaccine's protective effects may last for several years, but its exact duration can differ among individuals. Regular screening and preventive measures remain essential in managing tuberculosis exposure and infection.