New vaccine strategies resulting from progress in biochemistry and molecular biology include the production of

DNA vaccines, recombinant vector vaccines, and synthetic peptides.

DNA vaccines: DNA vaccination is a technique for protecting against disease by injection with genetically engineered DNA so cells directly produce an antigen, producing a protective immunological response

recombinant vector vaccines: Recombinant vector vaccines are experimental vaccines similar to DNA vaccines, but they use an attenuated virus or bacterium to introduce microbial DNA to cells of the body. 

synthetic peptides: In organic chemistry, peptide synthesis is the production of peptides, which are organic compounds in which multiple amino acids are linked via amide bonds, also known as peptide bonds.

Hope this helps :))