Analysis of the effectiveness and international impact and influence of the World Health Organization, the leading global healthcare system, with a focus on key aspects. These are: structure and composition, including reforms and historical insight, the role of WHO during the COVID-19 pandemic, the essential aspect of funding and contribution from member states, as well as the future of WHO and its effectiveness in its aims and strategies. The World Health Organization has many criticisms and strengths, which are weighed up in accordance to each aspect and overall judged to achieve a conclusive outcome and measurement of the effectiveness of WHO as a global organization.