Health Determinants and Disease Prevention Strategies

The Concept of Health

The World Health Organization (WHO) defines health as a state of complete physical, mental, and social well-being. This definition is often considered too idealistic because few individuals achieve such a complete state. The health status of individuals results from various factors, including genetic legacy, environment, behavioral choices, and access to health systems.

Risk Factors and Their Impact

A risk factor is any detectable circumstance in a person related to the probability of developing a disease. These may be associated with individuals, family groups, or communities, acting together to enhance their effects. In all societies, certain individuals or communities have a higher likelihood of becoming ill or dying. There are two types of risk factors:

• Those who can change: These are modifiable factors that depend on the behavior of people.
• Those who cannot be changed: Among these are age, sex, and genetic inheritance.

Public Health and Preventive Medicine

Public health involves the application of the scientific method to health and disease problems considered as subjects of the community. Preventive medicine is a branch of medicine concerned with preventing the appearance of disease in individuals, families, or groups of people based on medical science knowledge.

Three Levels of Prevention

• Primary prevention: Attendance to factors aimed at minimizing risk and preventing the later onset of disease.
• Secondary prevention: Aims to prevent the clinical manifestations of a disease through its early detection.
• Tertiary prevention: Aimed at improving the clinical course of a disease and avoiding complications or damage it causes.

Disease and Pathology

A disease is a mental or physical disorder that causes changes in normal body function. Pathology refers to the changes that occur in the body because of the disease. Conditions fall into two categories: infectious and non-infectious.

Non-Infectious Diseases

Non-infectious diseases are those whose causes are not pathogens. This group includes mostly non-communicable diseases and traumas. Several groups are distinguished:

• Hereditary or genetic diseases: These are inherited from parents; many are chronic and remain for life.
• Mental illness: Causes characterized by abnormal personality disorders.
• Specific diseases of organs and systems: These affect different organs or body systems.
• Autoimmune diseases: Those that are due to a failure in the immune system.
• Diseases caused by accidents: Includes pathologies produced in traffic, domestic, or labor accidents.

Infectious Diseases and Epidemiology

Infectious diseases are caused by pathogenic microorganisms such as bacteria, viruses, fungi, or protozoa. Their growth in the cells and tissues of the host causes infection. Key epidemiological terms include:

• Prevalence: The number of patients with a certain disease at a given time.
• Incidence: The number of new cases appearing in a population.
• Contagiousness: The ability of the organism to spread.
• Infectivity: The infectious agent's ability to settle and multiply.
• Pathogenicity: The pathogen's ability to produce disease.
• Virulence: The degree of pathogenicity.