Public health, like medicine, focuses on three stages of prevention: primary, secondary, and tertiary. Primary prevention means preventing disease before it occurs by altering behaviors.

In medicine, there are four levels of care: primary, secondary, tertiary, and quaternary. The levels of care refer to the complexity of the medical cases that healthcare providers treat and the ...

You can have either primary, secondary or tertiary adrenal insufficiency. Primary adrenal insufficiency is when your adrenal glands are damaged and can’t make the cortisol you need. They also ...