Prevention and Public Health Terms

Prevention, screening, health risks, epidemiology, and population health. Browse definitions and meanings below.

62 terms

What is public health?

Public health is concerned with the health of populations rather than of individual patients. It works through prevention, surveillance, vaccination, sanitation, screening programs and policy, and its results are usually counted as illnesses that did not happen, which is why the work is easy to overlook.

Prevention is described in levels, and much of the vocabulary depends on the distinction. Primary prevention stops a condition arising at all. Secondary prevention catches it early through screening, before symptoms. Tertiary prevention limits the damage once it is established. All three are prevention, acting at different moments.

Terms in this topic

Alphabetical order

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.