They did work. They reduced the infection among the vaccinated. It was the unvaccinated that kept spreading it unchecked so that it had more chances to mutate.
GET THE VACCINE BECAUSE IT WORKS! GET 3 BOOSTERS BECAUSE IT DIDN'T WORK! THE VACCINES AND BOOSTERS DON'T STOP THE NEW VARIANTS! THE VACCINES WORK BUT WEAR THAT MASK, LOCK DOWN AND SOCIAL DISTANCE BECAUSE IT DOESN'T STOP THE VIRUS!