According to this simplified diagram, your cellular DNA is the storage vault for instructions on making proteins. Messenger RNA is the temporary set of instructions, and proteins are the applications made. Proteins perform functions required by the cells.
Therefore, proteins made from mRNA are the workers of the body; mRNA made from DNA is the code to make the proteins; and DNA contains this bio-intelligence. (Click image to enlarge)
COVID-19 and upcoming vaccines are mRNA vaccines, which means they insert genetic code into cells to give them new instructions. They are being called "the software of life." Biotech claims these instructions will keep us disease-free.