Health and disease

• Health: The state of physical and mental well-being of an individual.
• Disease: A condition that is caused by a pathogen and results in a loss of health.
• Communicable disease: A disease that can be passed from one person to another. E.g. malaria, common cold, HIV.
• Non-communicable disease: Disease that cannot be spread from person to person. E.g. cancer, heart disease, broken bone.
• What is the role of the immune system?

  To detect and destroy pathogens.
• Are pathogens responsible for communicable or non-communicable diseases?

  Communicable.
• Does the immune system generally protect against communicable or non-communicable diseases?

  Communicable diseases.
• Mental health: The state of a person's mind, including their emotional, psychological, and social wellbeing.
• Mental illness: Generally disorders that affect mood, thinking and behaviour. E.g. depression, schizophrenia, anxiety disorders.