This is cool but I’m sorry, that’s not a vaccine - it’s a prophylactic. A vaccine or inoculation is named because it creates a sustained adaptation to a targeted antigen. Something that boosts immune response is not an acquired adaptation! This would need to be re-upped every month or so. Good for travel and brief encounters. Not an actual immunization. Not too mention boosting cell growth factors can have unintended…
I would also mention, just general auto-immune diseases. I would be very worried this could trigger those in people who wouldn't have gotten one otherwise.
What this treatment does is the opposite side of that coin, it mimics cytokines in order to PROMOTE an immune response.
Immune regulation is an area that deserves a lot more research, and there is going to be learning (harm) along the way. An increasing body of science is pointing to autoimmune diseases being triggered by traditional vaccines, which are then treated by the biologics above that increase the likelihood of other disease due to immunosuppression, which can now be treated(?) by a new immunobooster AKA universal vaccine?