This WHO information document explains the compassionate use of the investigational Ebola vaccine (rVSV-ZEBOV) during the Ebola outbreak in North Kivu, Democratic Republic of the Congo. It answers common questions about the vaccine, including how it works, who is eligible to receive it, the ring vaccination strategy, possible side effects, and safety measures. The document emphasizes that vaccination is voluntary and forms only one part of a broader Ebola outbreak response that also includes case isolation, contact tracing, safe burials, and community engagement. Its purpose is to provide clear and accessible information to the public and healthcare workers about Ebola vaccination and outbreak control.