[Reading Restrictions]
The "Plague Book," a special type of book unique to the Source Epidemic Area and associated with the orgin of illnesses, may be formally granted to an individual, but there are still reading level restrictions involved.
These restrictions are directly related to the individual's purity level of the disease.
Initially, individuals who received the Plague Book could only read the prologue. To access the official chapters, they need to increase their purity in relation to the plague*
*Purity refers to the concentration of the illness associated with the Source Epidemic Area within the individual,
such as the total number of a cancer patient's tumors or the purity of pus,
the concentration of the Death Plague in real dead or the complexity of the bacterial bodies,
the number of iron chains on the monk, as well as hardness and the depth of pain, etc.
