Any process that stops, prevents, or reduces the frequency, rate or extent of natural killer cell differentiation as part of an immune response.
Comment:
Note that immunologists typically use the word 'development' to refer to cells of B or T cell lineages undergoing the process that GO describes as 'cell differentiation'.
Synonyms:
narrow_synonym:
inhibition of natural killer cell differentiation during immune response
related_synonym:
down regulation of natural killer cell differentiation during immune response; downregulation of natural killer cell differentiation during immune response; negative regulation of NK cell differentiation during immune response; negative regulation of natural killer cell development involved in immune response; negative regulation of natural killer cell differentiation during immune response