Whitelight

Whitelight was supposed to be a cure for the Blacklight Virus. However, alex mercer got Dr. Archer to taint the cure using a sample of his blood. This caused whitelight to transform anyone exposed to it into either Evolved or Infected.

Trivia

 * After whitelight has been tainted, it can be found at anytime in game stored in barrels and tanks. When punctured, the whitelight will leak out turning any nearby humans into infected.