That'd be the ideal implementation in my opinion, but I'm a Cybersen guy. The more data you have to work with the greater your level of affectation. Biomedical data can inform public health decisions on things like disease outbreaks, parasites, and lab values. That's the most non-invasive form of gathering it without voluntary submissions by doctors, but they're only gathering data from patients who actually go to the doctor. The patients who are particularly vulnerable to environmental illnesses have financial/physical/mental barriers to that.