 Elderly populations are also a good target for MMR-based screening, because the radiation risk is less important and because they have a higher risk of tuberculosis (85 per 100,000 in developed countries, in the average).In Japan, for example, it is still used routinely, and the Japan Anti-Tuberculosis Association (JATA) reported the detection of 228 cases in 965,440 chest radiographs in 1996 alone.MMR is most useful at detecting tuberculosis infection in the asymptomatic phase, and it should be combined with tuberculin skin tests and clinical questioning in order to be more effective.