How to read tb skin test?
Reading a tb test is usually left up to the doctor, but you can pretty much tell if there is a red circle on you’re arm that’s a few millimeters wide the test is positive. A positive test can either mean you have tb or were exposed to it in the past. I found some very good information on the subject at:http://www.ehow.com/how_2330328_read-tb-test.html.