Sounds like yet another way in which doctors are inferior to machine learning algorithms: A log of the patient's activities and symptoms, or some kind of daily

Sounds like yet another way in which doctors are inferior to machine learning algorithms: A log of the patient's activities and symptoms, or some kind of daily journal would also be nice, but there's a lot of predictive anomaly detection algorithms that would do just fine with the raw data, finding patterns of activity and rest and adjusting for them.