or depth of the scar is not a direct metric for the strength of a person’s immunity against tuberculosis. Diagnostic clinical tests, such as the Mantoux tuberculin skin test, are far more accurate indicators of protection than the presence of a cutaneous mark, which can often fade or never form depending on the individual’s unique healing process.
Finally, it is essential to understand that the BCG scar is entirely benign and poses no threat to long-term health or immune stability. It is not a sign of a “damaged” immune system;
