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| Ask the Doctor |
Free Medical Advice sponsored by
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Got an ache or pain? Have a question about a prescription or over-the-counter drug? Looking for some FREE medical advice?
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Question:
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My daughter is 15 months old and needs her immunizations this month. In addition to the regular shots, I'd like her to have a TB test. How long do I have to wait between the test and the actual TB shot?
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Answer:
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Prior BCG vaccination is not a contraindication for PPD skin testing. Both PPD testing and BCG vaccination can in some cases result in a strong local skin reaction with swelling, pain, redness and occasional ulceration at the injection site. It's permissible to administer the tuberculin skin test EITHER on the same day that live-virus immunization is administered OR 4-6 weeks later. I'm not clear from what you say below if you are intending to first have the child have a PPD test and then a BCG vaccination.... if you are, suggest you discuss this with your paediatrician. Hope this helps.
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