Symbiote Genesis (v1.1)

It’s 150 years, give or take, since the Zombie Apocalypse. Your family has dedicated itself to understanding what makes zombies… um… zombies. There’s a symbiote/parasite that animates the zombies. Your family has isolated the parasite and can engineer strains to do almost anything: Super-strength and speed? Sure. Enlarged attributes and obedience? Yep. Powerful pheromones? Yep. Phenomenal regeneration? Sure! You wake up on a cold winter day in your bunker/lab to the buzzing of the “doorbell” of your outer airlock. What do you do?