Humoral immunity

Humoral immunity is the aspect of the immune system that refers to antibody production and the functions of antibodies that are found in blood serum. It is in contrast to cell-mediated immunity, which refers to immunity associated with cells. Both the innate immune system and the acquired or adaptive immune system contain humoral and cellular components.

B cells are a major component of the humoral immunity system.

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 * Video: Types of immune responses: Innate and adaptive, humoral vs. cell-mediated by Khan Academy