The vaccines we have probably all taken, were called immunization shots for a reason. I don't think "vaccine" is the right word for this.
Oxford vaccine definition: a substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute, treated to act as an antigen without inducing the disease.
Oxford immunization definition: the action of making a person or animal immune to infection, typically by inoculation.
Potatoes, potahtoes. Pfiezer, Moderno, Aztra-Senaca vac-immues are being proven to have short efficacy, because of quick mutation. I'm not going with a "booster" for every mutation that rears up. Therapeutic protocols ARE working around the World, as is reported every day.