Major Disease Categories: Infectious, Non-Communicable, Injuries, Mental Health, and Environmental

Global Burden of Disease Framework

1. Infectious Diseases

Caused by pathogens: bacteria, viruses, parasites, fungi. Transmission occurs person-to-person, via vectors, fomites, or contaminated food and water. Examples include COVID-19, tuberculosis, malaria, HIV, influenza, and diarrheal diseases.

2. Non-Communicable Diseases (NCDs)

Chronic, non-infectious conditions driven by genetics, lifestyle (tobacco, diet, inactivity, alcohol), and environment. Major groups: cardiovascular diseases, cancers, chronic respiratory diseases, diabetes. Account for approximately 74% of global deaths.

3. Injuries

Unintentional (road traffic crashes, falls, burns, drowning) and intentional (self-harm, interpersonal violence, war). A leading cause of death and disability in young adults.

4. Mental Health Disorders

Depression, anxiety, bipolar disorder, schizophrenia, substance use disorders. The leading cause of years lived with disability (YLDs). Stigma and access barriers persist globally.

5. Nutritional Deficiencies

Iron deficiency anemia, vitamin A deficiency, iodine deficiency, protein-energy malnutrition. These impair growth, cognition, and immunity, particularly in children.

6. Environmental Hazards

Air pollution (ambient and household), water contamination, soil toxins, noise, radiation, and climate change impacts. These drive NCDs, infections, and injuries.

7. Workplace Hazards

Chemical, physical, biological, ergonomic, and psychosocial risks. Occupational diseases include pneumoconiosis, hearing loss, occupational cancers, and stress disorders.

Public Health Response

Effective response requires surveillance, prevention (vaccines, regulation, health promotion), early detection, treatment access, rehabilitation, and an equity focus. Multi-sectoral collaboration is essential.