What are immediate causes and contributory causes of disease?
(i) Immediate cause of disease are infectious organisms like virus, bacteria, fungi, protozoan etc.
(ii) Contributory causes of disease are :
(a) Poor health due to lack of good nourishment.
(b) Poor hygiene condition, economic condition due to which one does not get proper and sufficient food.
(c) Genetic difference which make some people more prone to disease than others.