Maybe? Or maybe like converge with the person, depending on who it is?
Like Sabastian seems like his own body took over the infection and made it part of his body. I'm sure it could go multiple ways, like maybe some humans get converted more to aliens?
Well, I think there should be a distinct difference between the ones who took over human bodies, and the ones who were actually born via eggs.
I was playing with the idea that the spores travel from planet to planet, not truly having a specific shape themselves. They infect a race, take it over, and assume their form. They would use the humans to birth themselves if that makes sense?