Health and Disease

• Diseases are major causes of ill health
• Health is the state of physical and mental wellbeing
• What is health?( definition )

  the state of physical and mental wellbeing
• Non communicable diseases are not passed on from person to person.
• Communicable diseases are passed on from person to person.
• Non Communicable diseases :

  • Number of cases changes gradually over time
  • Cases may be widespread
• Communicable diseases

  • Rapid variation in the number of cases over time
  • Cases are often localised
• Communicable or Non communicable diseases ?

  • Cardiovascular disease - non-communicable
  • Colds - communicable
  • Flu - communicable
  • Cancer - non-communicable
  • Food poising - communicable
  • Diabetes - non-communicable
• Diseases are not the only factors that affect health . These factor also affect health:

  1. Diet
  2. Stress
  3. Life situations
• Defects in the immune system means you are more prone to infectious diseases.
• Immune reactions caused by pathogens can trigger alergies
• Viruses in cells can trigger cancer