Germs: Understand and protect against bacteria, viruses and infections

जून 14, 2026
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Infectious agents: From bacteria to worms

Bacteria

Viruses

Fungi

Protozoans

Helminths

Understanding infection versus disease

Warding off germs and infection

When to seek medical care

Updated: March 5, 2024

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© 2026 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved.