The World Health Organization is a specialized agency of the United Nations responsible for global public health. Its primary functions include coordinating international health responses, monitoring disease outbreaks, and providing technical assistance to countries. WHO sets global health standards, issues health guidelines, and supports vaccination programs worldwide. It also works to strengthen healthcare systems, promote mental health, and improve access to essential medicines. During global health emergencies, WHO plays a key role in sharing information and coordinating international efforts to control and prevent diseases.