When a new antigen is presented to the immune system, an immune response leads to antibodies are released. The second time this happens it is much faster - explain why

In the primary immune response, there is antigen presentation followed by clonal selection, expansion and differentiation of helper t cells. This leads to plasma cells releasing antibodies and the development of memory cells.The number of antibodies produced in the primary immune response is less than in the secondary response and they last in the blood for a shorter amount of timeIn the secondary response, because there are now memory cells, clonal selection and expansion happen much more quickly, meaning antibodies can be released much faster and at a higher concentration