SCP-1025 is a hardcover book, approximately 1,500 pages long. The front cover and spine feature the title "The Encyclopedia of Common Diseases, by Coltan Press". No other copies of a book with that title and publisher have been found, and no record of the publisher exists.
SCP-1025 can be found in a storage room adjacent to SCP-714's room. The player must have a key card of at least level 3 or higher in order to enter its room. If the player decides to read SCP-1025, a random page will be selected and the player will receive any of the following:
Appendicitis: Displays the messages "The pain in your stomach is getting unbearable" after a prolonged period of time; will significantly lower the rate of stamina regeneration after this happens.
Asthma: Coughing at intervals proportional to the player's remaining stamina; lowers the player's speed proportional to the player's remaining stamina.
Cardiac Arrest: Increased heart beat frequency, eventually leading to death.
Chickenpox: The message "Your skin is feeling itchy" is displayed at random intervals.
Common Cold: Coughing at random intervals; significantly lower the rate of stamina regeneration
Lung Cancer: Coughing at random intervals and completely stops stamina regeneration, preventing the player from running.
There are a number of ways to negate SCP-1025's effects; an upgraded gas mask can negate the effects of lung cancer and the common cold, but not cure them. SCP-500 is capable of curing all symptoms. If the player is wearing SCP-714, then they won't develop any of the symptoms. However, applying the ring after reading the page will not prevent and/or cure the effects from happening.
The author of SCP-1025 is left unknown on the Foundation site, but is named Coltan Press in the game. This may be due to the fact that the Encyclopedia of Common Diseases is a real book written by a staff member of the Prevention Magazine, Coltan Press.
The Common Cold page has a stain on it. This may have been added to imply that previous readers have sneezed on it, like a natural side-effect of having the common cold.
The information on SCP-1025's pages are direct excerpts from Wikipedia.
The original documentation of SCP-1025 indirectly states that the book does not actually afflict diseases; instead, it's a book that makes people paranoid of others around them, thinking they are infected with diseases most virulent and pestile. Hence, the effects of SCP-1025 are ironically a factual atrocity.
As of v.0.9, SCP-1025 is now across the hall from SCP-714, with its own antechamber, rather than connected by the same antechamber.
It is unknown why SCP-1025 has a page about Cardiac Arrest (heart attack) because heart attacks are not a disease, but rather an organ failure.