Zombie Antidote

The Zombie Antidote was a re-engineered version of the zombie plague created by George Gutter. It was used to cure Alyssa. She then became a sort of "living antidote" whose touch allowed zombies to evolve to become civil and intelligent as the Half-zombie.

History
George Gutter accidentally created the zombie plague as a means to cure diseases and keep people alive for thousands of years. Once the Apocalypse began in July of 2013, Gutter created a bottle of a liquid medication that could cure the affliction that he had created. Gutter hid the antidote away in his apartment and sent a plea out on the internet for someone to come and claim it. Jack, Ryan and John raced The Guy With The Car and the Arthur Beansman Community to Gutter's New York Apartment to claim the antidote, and after John defeated The Guy With the Car the antidote was recovered by Jack, who vowed to mass produce it.

However, this task proved to be impossible. At some point over the next six years, John was separated from Jack and Ryan with the zombie antidote. John was mortally wounded in the morning of May 23, 2019, and used his fading strength to pass on the antidote to Annika. Overwhelmed by the prospect of guarding the cure that could save the world, she locked away the antidote. Like the previous guardians of the antidote, she believed that someone would come to mass produce the antidote, and refused to take it herself even after being bitten by Alyssa, a zombie. A hallucination of Alyssa's human side convinced Annika to take the antidote herself, but at the last second she sacrificed herself to save her new friend and gave the antidote to Alyssa.

Two years later, Alyssa reunited with her old lover, Molly. Upon their embrace, Alyssa realized that because of her immunity to the zombie plague, physical contact with a zombie could restore some of the intelligence of the undead and allow them to evolve into half-zombies. She would then use this ability to cure Ryan, and over the course of the next five years cured every zombie on Earth, ending the apocalypse.

Appearances

 * Rise of the Dead 2: Apocalypse
 * The Rise of the Dead
 * Rise of the Dead: The Undead Heart (Archival footage only)