What are 3 levels of causes of disease class 9?
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Congenital diseases:These diseases are present since birth.They are caused due to genetic abnormality or due to metabolic disorders or malfunctioning of any order.
Acquired diseases:These diseases are those which develop after birth.
Acquired diseases:These diseases are those which develop after birth.
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Immediate cause: The organisms that enter our body and cause the disease are termed as an immediate cause. For example, virus, bacteria, protozoa etc.
Contributory cause: The secondary factors which led these organisms enter our body are termed as a contributory cause.
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