immunogenicity
C2CEFR level
95/100Rarity: very rare
TechnicalRegister
The capacity of a substance to provoke an immune response.
The biologic's immunogenicity meant some patients developed antibodies that reduced its effect over time.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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