The Old World, also known as the Focus of Infection.
Yi Chen had read about the Old World in the foundational collection area of the Great Book Library. This matter was not kept secret but was fully disclosed to the organization.
The organization, established for so many years, had sacrificed countless distinguished gentlemen, confirming this through extensive investigations.
All illnesses were not autonomously produced by the world but were directly or indirectly infected from the Old World, which was the origin of diseases, a collection point for all the root causes of illnesses.
On the title page of the book, there was a sentence left by the founder of the organization, along with an illustration.
"It is not that we contracted the disease, but the disease came to us."
The illustration was divided into three parts:
1. Sketching a planet representing human life, with Central Domain and the Five Continents clearly marked, completely normal without any issues.