SCP-049 is the plague doctor entity from the SCP Foundation, a long-running collaborative horror fiction project where fictional anomalies are documented like scientific reports. Dressed in a beaked mask and old-fashioned robes, he has become one of its most recognisable monsters, appearing in fan games, animations and horror videos. The singing version took on a second life online, where the contrast between his grim appearance and a calm, melodic voice made it perfect for memes and soundboards. It endures because it is instantly recognisable to SCP fans while still working as a standalone creepy joke for newcomers.