How do I know if I have a positive tb test?

  • Thread starter Thread starter chicken_little_osu
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chicken_little_osu

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I had a tb test at work today. Ever since the initial injection bump went down it has left a growing red circle. Right now it's probably the size of a quarter and slightly raised. I think it's stopped growing now. I know they don't measure reactions for 48-72 hours after the initial test, but does that mean that I shouldn't have a reaction until 48 hours or if I am positive would I be having a reaction now. I really don't want to pay for a chest x-ray.
 
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