Not to condone such an intrusive government but I've read that a lot of personal info is public record but with the result of, for example, being able to track

Not to condone such an intrusive government but I've read that a lot of personal info is public record but with the result of, for example, being able to track diseases with great precision in families over decades. I forget whereI read it but there is more to it than that but the gist of it is the existence of such a massive amount of data results in amazing discoveries.