A main difference between a person contracting an infectious disease and a chronic disease is:

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Infectious diseases are caused by pathogens such as bacteria, viruses, or parasites, and can be transmitted from one person to another. They can often be cured with medications, antibiotics, or antivirals. Chronic diseases, on the other hand, are caused by lifestyle factors such as poor diet, lack of exercise, and smoking, and are often long-lasting and incurable. While nutrition can play a role in preventing both infectious and chronic diseases, immune-strengthening foods alone cannot prevent all infectious diseases. People in developed countries can still contract infectious diseases, as global travel and migration can spread diseases across borders.

A Main Difference Between a Person Contracting an Infectious Disease