Perhaps you are right, I am just surprised with almost a month of unrestricted vaccine uptake opportunities in the US, the rate of vaccination (people who have taken at least one dose) is significantly lower than the UK, which as you note is experiencing significant supply difficulties. I also think that dealing with vaccine hesitancy effectively is the mark of a good healthcare system, but of course there can be many causes of vaccine hesitancy and there is no good way to measure outreach.