It is estimated that the US will withdraw from the World Health Organization (WHO) within the first days of Trump taking office. As you may recall, Trump already withdrew from the organization during his previous term, but President Biden reversed the decision.
The US currently provides the WHO with about a billion dollars a year, but since 80% of the organization's funding comes from private entities, it is estimated that the organization could function without American support.
A number of other countries, such as Slovenia and Austria, have also recently expressed concerns that the WHO could override the country's national sovereignty.
A spokesperson for the European Commission stated that the Commission would do its best to support the WHO, within the limits of its budget.