TB is making a comeback around here. For some reason, it seems to be a real health issue among the illegals getting in to our country (I'm not giving an opinion on it, just an observation). Most health care workers and teachers are required to have tests yearly. I know of some who are tested more often. And in the schools in this part of Texas, at least, the students do have to have tine tests, I don't know how often. When we lived in Massachusetts our children had to have a TBest for school once and that's it. However, when we moved to Texas, they had to have one again as part of their regular school shots. I tried to tell the school, "TB test? Oh, they had that years ago." I didn't know it would have to be done regularly.