Defining Health and Disease

Health is a state of physical, mental and social well being, which includes the absence of any weaknesses. Food and shelter help to maintain health and avoid disease. 

What is disease?

Disease is a condition that impairs the normal functioning of an organism.

Diseases can be infectious, non-infectious, acute or chronic. 

Infectious Disease

Infectious diseases can be passed between individuals. 

They're caused by infection with pathogens or parasites:

• A pathogen is an organism that can cause disease
• A…