There are some pros. Like mitigated health risks due to monitoring for outbreaks. Or being able to reallocate medical or emergency services to weighted areas.

There is a LOT of potential for misuse that, in my opinion, outweighs the good.

My personal thought is that we would need a Digital Information protection in place like how HIPAA protects medical data. I'm not the person with the background to do something but this is just a thought of a random internet person.