§ Mr. Jackson
asked the Minister of Health at what intervals his advisers consider it necessary to photograph people by mass radiology in order to be satisfied that they show no early traces of tuberculosis?1071W
§ Mr. E. Brown
Signs may pass from the radiologically imperceptible to the perceptible state in the interval between two examinations however short the interval, and no frequency of examination can give complete security. The practical question now and for some time to come must be how to make best use of the resources available.