>>8683490 PB EIS graduates in Public Health.
Other possibly important groups are those with MPH = Master of Public Health degrees.
Top ranked schools are Hopkins, Harvard, U North Carolina, Columbia & Emory but there are many programs and I believe those ppl also work in local and state health dept reporting results.
https://www.usnews.com/best-graduate-schools/top-health-schools/public-health-rankings