A perfect vaccination ought to be molecularly defined, safe, and stable. Dendritic cell, recombinant vector, DNA, and peptide vaccines are among the innovative vaccine types now under development.
Peptide Vaccine: A peptide vaccine imparts immunity to an organism by acting as a pathogen. A peptide vaccination always contains synthetic proteins that are natural counterparts of pathogen proteins.
For more: https://www.creative-biolabs.com/exosome/vaccine-development.htm