Any process that activates or increases the frequency, rate, or extent of antigen processing and presentation of peptide antigen.
Synonyms:
exact_synonym:
positive regulation of peptide antigen processing and presentation; up regulation of antigen processing and presentation of peptide antigen; upregulation of antigen processing and presentation of peptide antigen
narrow_synonym:
activation of antigen processing and presentation of peptide antigen; stimulation of antigen processing and presentation of peptide antigen