Disease Immune System Review DO NOW

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What is an infectious disease?

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An infectious disease is a disease caused by pathogens such as bacteria, viruses, fungi, or parasites that can be spread from one person to another.

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What are pathogens?

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Pathogens are microorganisms that can cause disease, including bacteria, viruses, fungi, and parasites.

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How can infectious diseases be spread?

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

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What is a vaccine?

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A vaccine is a preparation of dead or weakened pathogens that is introduced into the body to stimulate an immune response.

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What are antibodies?

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Antibodies are proteins produced by the immune system that attach to antigens and help tag pathogens for destruction.

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What are antigens?

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Antigens are foreign proteins found on the surface of pathogens that the immune system recognizes as 'non-self'.

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What is the role of B-cells in the immune response?

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B-cells are a type of white blood cell that produce antibodies in response to antigens.

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What happens during the primary immune response?

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During the primary immune response, the body encounters a pathogen for the first time and produces antibodies specific to that pathogen.

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What is the secondary immune response?

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The secondary immune response occurs when the body encounters the same pathogen again, resulting in a faster and more effective response due to memory cells.

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What is herd immunity?

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Herd immunity is when a large percentage of a population becomes immune to a disease, making its spread unlikely.