A common symptom of Red Link is to embed links to articles in other wiki articles, while not checking if that page exists, or even planning on ever creating said page. This lack of foresight is not known to be the cause of any delusion, but rather a complete lack of all judgement and common sense.
Red Link is very easily diagnosed early on. However, if left untreated, the symptoms will only get worse. After a patient is infected with Red Link for approximately 2-5 years, they will lose all sense of self, not being able to comprehend that they exist and being unable to care for themselves. After this, they are incurable, and must be put on medical aid.