[wstuartcl]

I think in this specific case both terms are being used in merged meanings. They are talking about using a national surveillance (as in surveillance state) data collection to help perform public heath surveillance.

What is being proposed from a public health surveillance perspective is reliant on a multifold and invasive surveillance state data collection and mining perspective.

[mirimir]

Back in the day, before electronic communications, public health surveillance was just the best surveillance possible. So I believe that it's a largely artificial distinction.

Even so, I agree that there are ways to do public health surveillance where the raw data is buried well enough that users only see actionable information, and only aggregate data is released.