Epidemiology
Epidemiology is the study of the distribution and determinants of diseases in populations. It is the key quantitative discipline that underpins public health, which is often defined as the organised efforts of society to prevent disease and to promote health.
--Prof. Danesh, School of Clinical Medicine, University of Cambridge
Source: http://www.niehs.nih.gov/
The following courses might find this guide useful ----
HTSC 440 Intro to Epidemiology
NRSG 335 Health Promotion and Assessment for RNs
NRSG 440 Community Health for RNs
NRSG 497 Intro to Nursing Research for RNs