Some people fall sick more often because their immune system is weak. Poor diet, stress, lack of sleep or existing health conditions make them more likely to catch infections, even in the same surroundings. Class 8 Science Curiosity Chapter 3 Health: ...
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Immunity is the body’s ability to fight harmful germs and diseases. It helps protect us from infections. A strong immune system keeps us healthy and prevents illnesses from spreading or becoming serious. Class 8 Science Curiosity Chapter 3 Health: The Ultimate ...
Vaccines are medicines that train our immune system to fight specific germs. They contain dead or weak germs that help the body recognize and attack real infections if they enter in the future. Class 8 Science Grade 8 Chapter 3 Health: ...
Acquired immunity is protection developed after our body faces a disease or gets vaccinated. The immune system remembers the germ and fights it faster and stronger if it enters the body again. Class 8 Science Grade 8 Chapter 3 Health: The ...
Yes, the first vaccine was discovered in the late 1700s by Edward Jenner. He used cowpox virus to protect people from deadly smallpox. This discovery started the practice of vaccination worldwide. Class 8 Science Grade 8 Chapter 3 Health: The Ultimate ...