What is difference between Corrective actions and preventive actions?

The term used in short is CAPA, stands for Corrective Action Preventive Action.
Corrective Action Preventive Action (CAPA) is a process which
investigates and solves problems,
identifies causes,
takes corrective action and
Prevents recurrence of the root causes.
Example – when we fall sick, we seek medical attention, and health care specialist offer us remedy and relief, but what if we do not get relief or do not recover. We ask for corrective actions and we think of preventive action as well.