clonal expansion

https://doi.org/10.1351/goldbook.13014
Proliferation of B lymphocytes and T lymphocytes activated by clonal selection in order to produce a clone of identical cells.
Note: Clonal expansion enables the body to have sufficient numbers of antigen-specific lymphocytes to mount an effective immune response.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1145 [Terms] [Paper]