Why are COVID-19 vaccine uptakes different across wealthy nations?

In wealthy countries, there's a big difference in how many people get the COVID-19 vaccine. We wanted to find out why this happens at different stages of the pandemic. Some countries did way better than others in getting people vaccinated. To understand why, researchers looked at various national factors. Wealth definitely played a role. Countries with more money had higher vaccine uptake. This makes sense because richer countries can afford more doses. But there's more to it. Trust in government and healthcare systems also mattered. People who trust their leaders tend to get vaccinated more. Access to healthcare was another key factor. Countries with better healthcare systems had higher vaccine uptake. This is because people can easily get vaccinated when healthcare is readily available. Interestingly, cultural factors also influenced vaccine uptake. Countries with high individualism, where people prioritize personal freedoms, saw lower vaccination rates. All these factors combined explain the big differences in vaccine uptake across wealthy nations.