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
Why are cases of chronic diseases fewer than cases of acute disease?
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A number of chronic diseases are metabolic disorders which appear after middle age, e.g., diabetes, hypertension. Some require a long exposure to the pathogen, e.g., leprosy. In all cases chronic diseases are slow developing diseases. Therefore, they occur in few cases as compared to acute diseases.