Germs

Germs: Understand and protect against bacteria, viruses and infection

Germs: Understand and protect against bacteria, viruses and infection

Germs — Learn how germs work and what you can do to protect yourself.

By Mayo Clinic Staff

Germs live everywhere. You can find germs (microbes) in the air; on food, plants and animals; in soil and water — and on just about every other surface, including your body.

Most germs won’t harm you. Your immune system protects you against infectious agents. However, some germs are difficult enemies because they’re constantly mutating to breach your immune system’s defenses. Knowing how germs work can increase your chances of avoiding infection.

Infectious agents:

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