This project aims to support host nations in delivering a safe and successful event, as part of WHO’s ongoing support to countries in strengthening the International Health Regulations capacities for prevention, detection and response to the public health events in the context of hosting Mass Gathering (MG) events, in collaboration with the WHO collaborating centres. The online course will provide an overview of the key steps and considerations that a host country will need to take when planning to host a MG. It consists of one introduction and eight independent technical modules