Hello and thanks for the link. I had what looked like a mosquito bite or insect bite just above my inner ankle and I put some soothing lotion on it. Initially i didn't think much of it because I walk my dog a few times a day every day and thought that was it. Until my ankle swelled up and also the "bite" site got really red and turned blue & increased to the size of a grape. It was very painful and felt hot to the touch. My dermatologist said it looked like TB and had me do a blood test for TB which showed latent TB. Since I live in Texas she said that her concern was that I may have come in contact with someone who had TB ( per the doctor all the people crossing over the border etc there were a lot of cases of TB being detected in Texas ) and to keep me safe as I have Lupus already the best option would be to take this course as a preventative measure. I have never had anything like this " bite" before so this did throw me for a loop. Scared the heck out of me for sure. Also, just to be clear I had NO other symptoms of TB and the chest X rays/cet scans were all clear as well.