Preventive care is organized into three levels: primary prevention, secondary prevention and tertiary prevention.
Primary prevention means intervention before health problems start. These include vaccinations, avoiding tobacco, drugs, and alcohol, and maintaining a healthy diet.
Secondary prevention involves identifying diseases and catching them in their earliest, most treatable, and most survivable stages.
Tertiary prevention occurs after the diagnosis of a disease. It covers the measures taken to stop or slow down the disease’s progression and its complications. These measures can include chemotherapy and radiation treatment for cancers, rehabilitation following an injury, and improving one’s diet after a type 2 diabetes or obesity diagnosis.