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What is the innate immune system?

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The innate immune system is always working and doesn't require any special preparation to defend against pathogens.

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How do viruses reproduce?

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Viruses reproduce by making host cells reproduce copies of the viruses.

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What is a pandemic?

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A pandemic is a disease that occurs over a wide geographic area and affects a very high proportion of the population.

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What is phagocytosis?

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Phagocytosis is the process where leukocytes engulf and digest bacteria.

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What are antibodies?

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Antibodies are Y-shaped proteins that may mark pathogens for destruction.

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What is the role of leukocytes in the immune system?

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Leukocytes, or white blood cells, play a crucial role in the immune system by identifying and eliminating pathogens.

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What is the difference between an epidemic and a pandemic?

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An epidemic is a disease that affects a large number of people within a specific area, while a pandemic spreads over multiple countries or continents.

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What are antigens?

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Antigens are substances that trigger an immune response, often found on the surface of pathogens.

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What is the function of T cells in the immune response?

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T cells are a type of lymphocyte that play a central role in cell-mediated immunity, helping to destroy infected host cells.

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What is the significance of the immune response?

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The immune response is crucial for protecting the body against infections and diseases by identifying and eliminating pathogens.