Health authorities around the world are still grappling with lessons learned at the start of the Covid-19 pandemic and trying to determine the best way to prevent a new one.
Many researchers have started referring to the next agent to cause mass illness around the world as “Disease X”. A 2022 statement from the World Health Organization (WHO), defines the term this way: “Disease X is [used] to indicate an unknown pathogen that could cause a serious international epidemic.”
