The sound comes from Minecraft, the sandbox game released by Mojang in 2011, where zombies are common hostile mobs that attack players and villagers at night. When a zombie infects a villager on higher difficulties, the villager becomes a zombie villager, a mechanic players know from survival mode and village raids. The groan has been clipped from gameplay and shared on soundboards and in fan edits because it is short, recognisable to millions of players, and works outside the game as a generic undead infection cue.
About this sound
The Minecraft zombie infect sound effect is a short groaning hurt noise from the game, used in videos and memes for zombie attacks and transformations.
This is the short groan and hit sound a Minecraft zombie makes when it infects a villager, turning a normal encounter into a zombie villager transformation. The clip is wet and guttural, with a low undead moan that rises over a soft game hit noise, instantly signalling danger in the blocky world. At just two seconds it feels abrupt and unsettling without being graphic. Viewers who know Minecraft recognise the threat immediately, while others hear a classic zombie groan that adds tension, comedy or a jump scare depending on the scene around it.