epidemiology

noun2

1. •
   The branch of science dealing with the spread and control of diseases, viruses, concepts etc. throughout populations or systems.

   • Melzer and Luke C. Pilling, a research fellow in genomic epidemiology at the University of Exeter Medical School, have also studied the genetics underlying longevity. — 2018
2. •
   The epidemiological body of knowledge about a particular thing.