I have recently received MMR and require a tuberculin skin...

Question: 

I have recently received MMR and require a tuberculin skin test. How long do I need to wait after my MMR booster to do the skin test?

Answer: 

Live virus vaccines (e.g., MMR and varicella vaccines) may interfere with the tuberculin skin test response and produce a false negative response.  For this reason, tuberculin skin testing should be delayed at least 4 weeks following date of immunization with a live vaccine.  Live virus vaccines will not interfere with the tuberculin test if given on the same day as the test.