so why did a vaccine come out in the UK prior to that in the USA?

They already had control of the UK. Already so far into the new world order that they were only worried about beating the news. They don't need all of us dead just most of us. Like it or not, Try as hard as you want, there is no saving the lemmings of society. They always DEMAND their demise and will achieve it even if they have to suicide themselves. They count on those people to help push their narrative.
The peacocks that the media just loves to put in front of the camera.
Clueless, Brainwashed, Lemmings.