Ebola crisis revealed WHO was not ready

The epidemic, which broke out in Guinea in December 2013, was not declared a public health emergency by WHO until August 2014 — which has been partly blamed for its rapid spread to neighbouring Sierra Leone and Liberia, resulting in more than 11,000 deaths.
WHO, which is part of the UN, has a number of responsibilities, including identifying any emergencies or hazards that pose a threat to human health and coordinating the response.