reactogenic
adjective
re·ac·to·gen·ic
(ˌ)rē-ˌak-tə-ˈjen-ik 
: capable of causing a reaction and especially an immunological reaction
a highly reactogenic vaccine
Cite this Entry
“Reactogenic.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/reactogenic. Accessed 1 Dec. 2025.
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