The user is a sentient meme, an idea that spreads between people by informing them about it, similar to how sick people spread diseases. Memes can spread through any form of communication: talking, books, TV, internet etc.
- Memory Erasure may stop the infection.
- Weeping Angels (Doctor Who)
- Hexus, The Living Corporation (Marvel Boy)
- The King in Yellow (stories by Robert W. Chambers and others)
- TATARi (TYPE-MOON)
- SCP-055 - An 'Anti-meme' (SCP Foundation)
- SCP-370 - A Key (SCP Foundation)
- SCP-423 - Self-Inserting Character (SCP Foundation)
- SCP-571 - Self-Propagating Infectious Pattern (SCP Foundation)
- SCP-582 - A Bundle of Stories (SCP Foundation)
- SCP-732 - The Fan-Fic Plague (SCP Foundation)
- Subjects affected by SCP-1372 - The Utter West (SCP Foundation)