Health and disease

• Health

  State of both physical and mental wellbeing
• Disease

  Group of conditions that can cause ill health
• Communicable disease

  Disease that can be spread
• Role of immune system

  Destroy and detect pathogens
• Are pathogens communicable

  Yes
• Does the immune system protect against communicable diseases the more?

  Yes
• Mental health

  Encompasses emotional, psychological, and social well-being
• Mental illness

  Refers to a wide range of mental health conditions that affect mood, thinking and behaviour.