Revised Clinical & Public Health Overview: “Disease X” – A Strategic Concept for Pandemic Preparedness Grounded in Current Evidence
1. Definition and Origin of the Term “Disease X” “Disease X” is a conceptual placeholder introduced by the World Health Organization (WHO) in February 2018 as part of its R&D Blueprint for Health Research and Innovation in Epidemic Context (WHO, 2018). It was not intended to refer to any specific pathogen but rather to underscore…