Merriam-Webster gives “vaccine” a new definition
languagelog.ldc.upenn.edu
languagelog.ldc.upenn.edu
"b : a preparation of genetic material (such as a strand of synthesized messenger RNA) that is used by the cells of the body to produce an antigenic substance (such as a fragment of virus spike protein)"
to what existed before:
"a : an antigenic preparation of a typically inactivated or attenuated (see attenuated sense 2) pathogenic agent (such as a bacterium or virus) or one of its components or products (such as a protein or toxin)"
All we did was include this:
"B: When a man stands on the third floor balcony and..."