The US is not in the World Health Group now. It was in the group for many years. The US joined in 1948. This is a change for how the US works with other countries.
The leaders in the US were not happy. They said the group did not help well with the virus. So, the US stopped giving money. It will work with the group less.
The US leaders said the group was not good. They thought it was not fair. This is why they decided to leave. Countries need to work together.
The US helped the group for a long time. It gave money. Now, the US will do its own plans.
Many people are worried. They think this is bad for health. The group needs money. Without US help, the group may have problems. The future is not clear.