recall antigen

https://doi.org/10.1351/goldbook.13636
Substance recognized by memory cells that stimulates rapid (secondary) immune responses, often associated with hypersensitivity.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1239 [Terms] [Paper]