You "may" need to file a waiver of inadmissibility worse case scenario on form I-601 BUt if you can secure medical recommendations or proof that your TB is no longer active you ought to be ok. It all depends on the physician/civil surgeon you are using who is approved by the US embassy in the country you are applying from or state/city here in the US and whether they make some negative recommendation/derogatory comment in your I-693 or limited medical exam if your overseas and then you can also seek a second opinion I recall or even the no objection letter from the CDC in Atlanta In vaguely recall. Has there already been a denial from the embassy stating your inadmissible to the US due to the TB scar even though your sputum test is negative?
I agree with Mr. Calehr's answer.
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I agree with my colleagues answers
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