Plague Inc. has been one of the more popular strategy simulator games on mobile devices since its release in 2012. According to ComicBook.com, the title has been going relatively strong since its debut. And now a new buff in the form of anti-vaxxers is sure to bring players in, old and new. Fans started a petition on Change.org to have anti-vaxxers added as a buff. Ndemic Creations promised to do so if 10,000 people signed the petition. 10,000 fans did sign, so the web developers are making good on their promise. But it's not so easy. The biggest challenge is that if everyone in Plague Inc.'s global simulation suddenly stopped getting vaccinated, then it would be a very easy game to win!