This is a lore question so I'm not sure if this is the right sub for it, but my friend and I were talking today and realized the infested are poorly explained as to what they are. It seems like they're a disease, but to what extent? Does it puppet the units from the inside physically or is it a mental psionic thing? If its mental, why are there tentacles coming out of the infested? Why can it infest structures? Does a structure getting infested mean anything or is it just goop over it? I know in Stukov's case in Co Op it gives them legs. Is infestation biomass the same as creep? Are infested sentient? Stukov and Kerrigan both are but they're clearly special cases. Does the infestation destroy the brain or just highjack it? In mission they're introduced, the first infested you encounter asks you to kill it, but other than that, the only thing infested every say is "for the swarm". What is the difference between neural parasite and infestation? Also are infested zombies? Like are they dead people brought back to life?
I know im probably reading too far into this, but I don't care. I enjoy the StarCraft setting and want to learn more and figured some of you mega nerds might have some thoughts on this. Thanks for the help!
