NCERT Important Questions Class 9 Science biology Chapter 13
Important NCERT Extra Questions
Chapter 13 Why do We Fall ill
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
What do you mean by immediate cause of disease?
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Immediate, precipitating or first level of cause of a disease is the actual agent or factor that causes the disease, e.g.,Virus in common diarrhoea.