What is 'Disease X'? Ebola, Sars, and Zika are among the illnesses we are familiar with, but the last one, "Disease X," has raised some questions. What is Disease X? "Disease X" refers to a hypothetical, unidentified disease that could potentially cause a future epidemic or pandemic. The actual nature and characteristics of any future disease outbreak would depend on the specific pathogen involved.

Source: dna May 26, 2023 12:51 UTC