4.2.2.5 health issues

• What is health?

  the state of physical and mental well-being
• what are major causes of ill health?

  diseases - both communicable and non-communicable
• what else has an effect of health?

  diet, stress and life situations
• what happens when different types of disease interact?

  leads to a spiral of declining health
• what do defects in the immune system mean?

  an individual is more likely to suffer from infectious diseases
• what can be the trigger for cancers?

  viruses living in cells
• what can trigger allergies?

  immune reactions initially caused by a pathogen
• what can severe physical health lead to?

  depression and other mental illnesses