desensitization

https://doi.org/10.1351/goldbook.13091
Generally transient state of specific non-reactivity in a previously sensitized individual, resulting from repeated antigen exposures.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1157 [Terms] [Paper]