What does a 2-step skin test have to do with BCG?
For people who require repeated skin testing, a 2-step test is done to establish a true baseline result. People who have been infected with TB in the past or had BCG years ago may have an initial negative result. However, a second test, given one or two weeks later, will be positive. This second test is accurate.
Related Questions
- When reading a tuberculin skin test, when should a history of BCG vaccination be ignored?
- When reading a tuberculin skin test, when should a history of BCG vaccination be ignored?
- Does a history of BCG vaccination change the interpretation of a tuberculin skin test?
- Does a history of BCG vaccination change the interpretation of a tuberculin skin test?
- Could BCG cause a positive TB skin test?
- Could BCG cause a positive TB skin test?
