A member asked:

How do doctors differentiate between a positive tb skin test due to bcg vaccine vs latent tb infection?

A doctor has provided 1 answer

Blood test: There is a blood test which can help tell the difference.

Answered 1/19/2014

4.6k views

Thank

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If I have a BCG vaccine do I need xray every time I get TB test?

6 doctors weighed in across 2 answers