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What is a vaccine?

Back

A substance used in vaccination that consists of pathogens that have been weakened or killed but can still trigger the immune system into action.

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What is NOT part of the immune system?

Back

Red blood cells.

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How can infectious diseases be spread?

Back

Infectious diseases can be spread by touching contaminated objects, not washing hands regularly, and being near infected people.

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What do antibodies do for your immune system?

Back

Antibodies help fight off infections.

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What is an antibiotic?

Back

A chemical that kills bacteria or slows their growth.

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What are white blood cells?

Back

Cells in the immune system that help fight infections.

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What is an antigen?

Back

A substance that triggers an immune response, often found on the surface of pathogens.

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What is the role of the immune system?

Back

To protect the body from infections and diseases.

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What is herd immunity?

Back

A form of indirect protection from infectious diseases that occurs when a large percentage of a population becomes immune.

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What are pathogens?

Back

Microorganisms that can cause disease, including bacteria, viruses, fungi, and parasites.