> For decades people would ask, "why is there no vaccine for the cold or flu like smallpox, measles, mumps, rubella, and chicken pox?" and the answer was that they were fast evolving corona viruses and you cannot vaccinate for those.

I would suggest doing some research on Google. We’ve had vaccines for influenza (flu) for over 70 years.

And yes, sometimes their efficacy was under 50% but they’ve always been called vaccines and have saved thousands of lives.