Why Do we Fall ill Class 9 Notes

Why Do We Fall ill Class 9 CBSE Notes – Chapter 13

Humans have been falling sick since times immemorial. Before science and technology, humans have attributed sickness to the supernatural, for instance, when there was a tuberculosis outbreak during the 19th century, people had associated its symptoms with vampirism. This is due to the fact that the patients often had very pale, deathly complexion and they would frequently cough up blood. But advancements in medicine and technology have provided a deeper insight into causative factors and the precautions one should take. Please refer Why Do we Fall ill Class 9 Notes for more revision notes.