The 3 stages of prevention are: Primary; Secondary; and Tertiary. Primary prevention focuses on keeping the healthy free of disease. Secondary prevention seeks detection and quick recovery for those affected but not showing clinical signs. The third type of prevention, tertiary, reduces the impact of the disease and occurrence.
The Rise of Chronic Conditions Unlike many ailments, chronic illnesses can be controlled but not cured. Check out this #infographic from the University of Arizona's College of Nursing for information on the prevalence of just three of many chronic illnesses.
There are three different types of prevention. This image has organized the three in a pyramid. Primary which is before one gets sick and maintains themselves healthy. The second is people who have are at risk for the health problem and they use preventative care. The third is the person has been affected and is now treating the problem.
The chain of infection has 3 main parts. A reservoir such as a human and an agent such as an amoeba. The mode of transmission can include direct contact, droplets, a vector such as a mosquito, a vehicle such as food, or the airborne route. The susceptible host has multiple portals of entry such as the mouth or a syringe.