![](http://up.wiki.x.io/wikipedia/commons/thumb/f/fa/Mantoux_tuberculin_skin_test.jpg/350px-Mantoux_tuberculin_skin_test.jpg)
A Mantoux tuberculin skin test, used to evaluate people for latent tuberculosis (TB) infection.
Photo credit: Greg Knobloch, United States Centers for Disease Control and Prevention (public domain)
Photo credit: Greg Knobloch, United States Centers for Disease Control and Prevention (public domain)