anamnestic

https://doi.org/10.1351/goldbook.12870
Describing immunological memory that gives rise to a rapid increase in immunological response after reexposure to antigen.
Note: Literally, "does not forget".
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1122 [Terms] [Paper]