immunifacient
/ˌɪmjʊnɪˈfeɪʃnt/ /ˌɪmjʊnɪˈfeɪʃɪənt/Medicine rare
adjective
Producing immunity; relating to the production of immunity.
Origin
Early 20th century; earliest use found in William Dorland (1864–1956), obstetrician. From immune + -i- + -facient, after immunify. Compare earlier immunifying and also immunifaction.