Diseases like typhoid, cholera and hepatitis A spread through dirty water or food. Germs enter the body when we drink unclean water or eat infected food. Boiling water and hygiene prevent them. Class 8 Science Grade 8 Chapter 3 Health: The ...
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Diseases like typhoid, cholera and hepatitis A spread through dirty water or food. Germs enter the body when we drink unclean water or eat infected food. Boiling water and hygiene prevent them. Class 8 Science Grade 8 Chapter 3 Health: The ...