Yes. See rDNA (recombinant) and other DNA vaccines. Started with Zika in 2015-2016, planned for HIV, and already approved for covid in India as "ZyCoV-D".

"the problem" they will say, "is that mRNA vaccines, while big in scope, didn't measure up in efficacy".

"it didn't get to the heart of the problem" they will claim in an evil play on words, "and for a very very few, causes problems like myocarditis".

Then they'll try to bring it home with, "but the new rDNA vaccine has been scientifically proven to protect against not just things like spike proteins, but the DNA/RNA of the [insert pathogen here] infectious agent itself."

"Trust us everybody. It'll work EVEN BETTER this time."

Yes. See rDNA (recombinant) and other DNA vaccines. Started with Zika in 2015-2016, planned for HIV, and already approved for covid in India as "ZyCoV-D".