Growth

Twenty years after a mysterious outbreak claimed the lives of everyone at the Advanced Parasitic Development at the Cuttyhunk Island Research Facility as well as most of the civilian population on the island, a woman who managed to narrowly escape infection discovers that the bug is much more resilient than scientists previously gave it credit for when she returns home to sell her parent's abandoned property. Now the parasites have evolved, and they can slip into any human orifice impossibly fast. If they manage to find a human host to carry them out of the danger zone, there's no telling how long it would take before the infection starts to spread all across the planet.