Praxeus
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File:The Infection Takes Over Praxeus Doctor Who Series 12 Praxeus was a bacterial pathogen originally designed to target plastic particles. However, it became a fatal disease that was able to infect beings with plastic inside them, such as humans containing microplastics or animals that consumed plastic waste.
When a humanoid was infected, their skin develop pale cracks across it, eventually overwhelming the body. In severe cases, the victim's body would disintegrate into a cloud of dust when Praxeus infected the entire body. It could be spread when contact was made with open wounds and between species. Human astronaut Adam Lang became first and only known survivor of Praxeus, due a cure derived from bird enzymes. (TV: Praxeus)