How Often Do You Need a TB Test? | Health Street Tuberculosis is a highly transmissible disease that affects the lungs. Certain employers require routine TB screening and testing for their employees. Learn more about how often to test for TB here.
BCG Vaccine Impact on TB Testing - Health Street Tuberculosis has been stalking humankind for hundreds of years, and has been quite deadly until very recently. A vaccine developed in the early part of the last century, known as the BCG vaccine, is still given to people in many countries. In the USA, where PPD testing is a common diagnostic tool to determine if someone has active TB, a history of BCG vaccination may complicate matters.
