There's now FHIR for sharing records between different vendors' EHR systems. There's a JSONLD representation of FHIR.
Which health and exercise apps can generate FHIR for self-reporting?
Can participants forward their other EHR/EMR records to the All of Us program?
Can participants or Red Cross or other blood donation services forward collected vitals and sample screening data to the All of Us program?
The bigger issue is that clinical imaging is done due to medical indications. Medical indications dramatically confound the results. A key element of the UK Biobank's value is that imaging and ECG are being done without any clinical indication.
SIEM tools do anomaly detection with lots of textual log data and sensor data.
What would a Cost-effectiveness analysis say about collecting data from healthy patients: https://en.wikipedia.org/wiki/Cost-effectiveness_analysis
TIL the ROC curve applies to medical tests.