Good (idea) Bad (tracking) & Ugly (possible outcome)
Brilliant Idea, but a Google tool tracking the real time health status of individuals? bring on the HIPAA (and all the other) audits.
For safety, testing should not become a background activity that people believe is always working, a failure will produce actual life threatening consequences for the those relying on a warning beep.
Oh and can we tone down the trend of AI with everything, measuring the amount x in xyz isn't remotely AI.