A disease's natural history is divided into five stages: underlying, susceptible, subclinical, clinical, recovery/disability/death, and recovery/disability/death. To focus the prevention of these stages of a disease, corresponding preventive health measures have been classified into similar stages. Primordial prevention, primary prevention, secondary prevention, and tertiary prevention are the four stages of prevention. These strategies, when combined, aim to avoid not just the onset of disease but also the downstream complications of a displayed disease through risk reduction. The management and care of a patient in order to battle disease or dysfunction is referred to as medical treatment.