We cannot do TD-60 readings in combat zones. We do not have the equipment required to do so, whether it is on a daily or weekly basis or some other frequency. We can't take blood or do other tests, either. You understand that. It is for practical reasons.
TD-60 readings are done at certain intervals. As I said earlier, National Defence entrusts this job to Health Canada. In other words, it is not done in the field by an individual, but in Health Canada laboratories.