Question

What is a 3rd generation vaccine

Answer 1

i generation vaccines: live attenuated pathogens
ii generation: chemically or physically inactivated pathogens
iii generation: contained purified and synthetic proteins.
iv generation: these vaccines are DNA and vector based vaccines

Third generation vaccines also called as DNA vaccines are made up of a small circular piece of bacterial DNA like plastid produced by genetic engineering. These express one or two proteins of pathogen to induce immunity.