Immune Defence: Part 2

The video explains how the immune system builds resistance to diseases through the production of antibodies. Pathogens produce antigens that lymphocytes recognize, triggering an immune response. Lymphocytes replicate and produce antibodies that tag pathogens for destruction. Some lymphocytes remain as memory cells, enabling a faster response to future infections. This process underlies the concept of immunity and the effectiveness of vaccinations.

Why is the body's response to a virus quicker after the first infection?

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Explain the concept of immunity and how it relates to vaccinations.

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