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Germs: Bacteria, Viruses, Fungi, and Protozoa for Parents
Germs are the microscopic bacteria, viruses, fungi, and protozoa that can cause disease.
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Germs: Bacteria, Viruses, Fungi, and Protozoa for Teens
Germs are tiny organisms that can cause disease - and they're so small that they can creep into your system without you noticing. Find out how to protect yourself.