The Micro World of Viruses and Bacteria

The world is full of tiny viruses and bacteria that can be seen only through a microscope. Some bacteria can be helpful, but others cause diseases such as typhoid fever. Viruses can cause deadly diseases such as COVID-19. In this book, readers will get all the facts about bacteria and viruses, including their similarities and differences, how they cause infections, and how people can keep dangerous germs from spreading.

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