Scientists have developed a new tool to predict the chances of a person developing tuberculosis, which could help limit the spread of the disease and improve the life chances of millions of people. The Guardian reports that researchers at University College London said they believe they have produced an algorithm that could help eliminate the disease in some countries. The scientists at the Institute of Global Health say this is the first time that patient histories have been used to predict risk of developing active TB, which should help doctors determine what treatment to offer.