The Uroboros virus is a fictional pathogen from the video game series Resident Evil. It is known for its ability to manipulate and control living organisms, often leading to mutations and aggressive behavior. The virus is associated with the Uroboros Project, which aimed to create a new form of bio-organic weapon. In the game, the Uroboros virus is primarily linked to the character Albert Wesker, who seeks to use it to achieve his vision of human evolution. The virus is depicted as a significant threat, contributing to the series' themes of bioengineering and the consequences of scientific experimentation.