UNICEF) is the world's largest single vaccine buyer, procuring more than 2 billion doses of various vaccines annually for routine immunisation and outbreak response on behalf of nearly 100 countries.With several vaccine candidates showing promise, the UNICEF, in collaboration with the Revolving Fund of the Pan American Health Organization (PAHO), will lead efforts to procure and supply doses of COVID-19 vaccines on behalf of the COVAX Global Vaccines Facility for 92 low and lower middle-income countries, whose vaccine purchases will be supported by the mechanism.The UNICEF will also serve as procurement coordinator to support purchases by 80 higher-income economies, which have expressed their intent to participate in the COVAX Facility and.