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Chapter 9 Chapter 10 - NCERT

Chapter 9 Chapter 10 - NCERT

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cough or sneezes of an infected person are either inhaled directly or transmitted through contaminated objects such as pens, books, cups, doorknobs, computer keyboard or mouse, etc., and cause infection in a healthy person. Some of the human diseases ar …

  Computer, Ncert, Infected, An infected

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