That is a US specific problem. In fact, it's a US Federal government specific problem. If you push responsibility from the Federal government to the states, ea

That is a US specific problem. In fact, it's a US Federal government specific problem. If you push responsibility from the Federal government to the states, each state has to work it out themselves. While the US is a republic of 50 states, there are some times where "states rights" should require them to work co-operatively to establish a standard for all 50 states. The current administration, throughout the entire pandemic, has abdicated its responsibility to co-ordinate this. The fact that states were forming their own co-operative approaches (see NY/NJ/CT et al) demonstrates the issue. Basically, the current administration castrated the CDC from performing its function, with political interference in what the CDC did and what the CDC announced. The current vaccine distribution is effectively "wholesale" with 50 retailers and then the Federal government abdicates any further responsibility.