Hello! I am a current nursing student and have a two fold question regarding TB.I was wondering if you're PPD test is positive and you do the INH treatment, is it possible to get reinfected after treatment? Would you ever have to do the INH treatment twice?Secondly, I was wondering how many of you have had a positive PPD test? I guess I'm wondering what are the odds/chances of becoming ppd positive? Thanks in advance!