2 doctors weighed in:

How long does effect of BCG vaccine last?

2 doctors weighed in
Dr. Jay Park
Pediatrics
1 doctor agrees

In brief: About 5 years

Positive tuberculin skin test (tst) measuring up to 10 mm lasts about 5 years.
Induration over 10 mm by tst after 5 years requires additional evaluation, e.g., chest x-ray or interferon-gamma assay.

In brief: About 5 years

Positive tuberculin skin test (tst) measuring up to 10 mm lasts about 5 years.
Induration over 10 mm by tst after 5 years requires additional evaluation, e.g., chest x-ray or interferon-gamma assay.
Dr. Jay Park
Dr. Jay Park
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