The US based Occupational Health & Safety Magazine, which in 2008 won an award from the American Society of Business Press Editors for magazines of 80,000 circulation or more, has the following news item
.....On Friday, CDC issued new and important guidelines on the detection of Mycobacterium tuberculosis infections, the causative agent of TB. In the guidelines, the agency advises that Interferon Gamma Release Assay (IGRA) blood tests are now preferred over the 100+-year-old tuberculin skin test (TST) for diagnosing TB infection in certain populations, including people who typically do not return for the necessary reading of TST results, and those who have received Bacille Calmette-Guérin (BCG) as a vaccine or for cancer therapy.
.....The populations specified by the new CDC guidelines represent a majority of those being screened for TB infection. Better, more reliable testing for TB infection is vital in order to efficiently identify the appropriate persons for treatment and thereby prevent its spread, the agency said
In most if not all developed countries worker safety is covered by Law, in the US it is the Occupational Safety and Health Act
