Penicillin, the first antibiotic, was discovered by Alexander Fleming in 1928. He saw that a mold killed bacteria in a petri dish. This discovery changed medicine and saved millions of lives worldwide. class 8 science chapter 3 health the ultimate treasure ...
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Pathogens are tiny organisms like bacteria, viruses, fungi or worms that cause diseases in humans and animals. They enter our body through air, water, food or contact and make us sick. Class 8 Science Curiosity Chapter 3 Health: The Ultimate Treasure ...
Yes, COVID-19 is a communicable disease caused by the coronavirus. It spreads through cough, sneeze or contact. It caused a global pandemic and people were advised to wear masks and maintain distance. Class 8 Science Grade 8 Chapter 3 Health: The ...