Cause of Disease



 Disease is a malfunction of body or mind which has an adverse effect on good health. Disease occurs when an infection leads to recognisable symptoms.


  • gain entry to the host
  • colonise the tissue of the host
  • resist the defences of the host
  • cause damage to the host tissues

Pathogens include:

  • Bacteria
  • Viruses
  • Fungi

Pathogens gen into the body by


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