SCP-253

SCP-253 SCP-253 starts with a fictional contagious cancer and then makes the scale of an outbreak part of what the disease can do. A small outbreak is already lethal. Once enough infected tissue exists across the affected population, the situation changes into something the Foundation doesn't fully understand. The material consists of undifferentiated human cells that behave like cancerous cells, continuing to grow when they have enough nutrition. It can pass between people and into some other animal species through contact with tumors on an infected subject's surface. The article specifically says it isn't airborne. Small groups of skin lesions appear first. Within twelve hours of those lesions appearing, scans can detect growths in the brain, even before obvious neurological symptoms develop. Over the next day or two, the lesions spread, the swelling becomes intensely painful, and the disease reaches the lymphatic system. The neurological effects vary with the parts of the brain involved. They can include memory loss, hallucinations, disorganized speech, euphoria, and major changes in behavior. One effect is consistent: around forty-eight hours after infection, the pain stops completely. Given everything else that is happening in the body, that sudden relief is a pretty disturbing development. The infection is continuing while the person's ability to experience the pain has changed. Below a combined cancer-cell mass of approximately fourteen hundred kilograms, infected hosts die within five days. The cells consume what usable material remains, and without another host or another source of resources, they eventually die as well. That's already enough for an awful outbreak, but at least there is an eventual limit. Above that threshold, the infected hosts begin producing unexplained electromagnetic activity. The file suggests those emissions allow communication between them. Their behavior becomes coordinated, as though a single entity is operating through multiple bodies. Initially, that intelligence seems animalistic and reactive. Researchers think the remaining brain tissue across the hosts may support greater intelligence, and a hospital incident appears to support that possibility. The report doesn't give us the full hospital incident. I wouldn't turn that missing information into a list of powers it has never been shown to possess. What matters is that the Foundation has reason to believe the outbreak can begin thinking with the people it has infected. The research site is isolated, with extreme sterilization contingencies tied to communications failures, power loss during experiments, environmental changes, and unusual electromagnetic activity. Testing near the biomass threshold in human subjects is denied. They are trying to learn enough to stop it without deliberately creating the coordinated version. Even attempts involving other anomalies go badly. SCP-427, which has helped with other cancers, accelerates growth in both the tumors and the patients here. The experiment has to be stopped before another dangerous threshold is reached. The scale is what gives this one its particular horror. Every additional infected person potentially contributes to the same developing entity. An outbreak becomes harder to control while also approaching the point where the thing spreading through it may be capable of planning around the people trying to contain it. Original Entry: https://scp-wiki.wikidot.com/scp-253