TV & Movies
The video game offers some major clues.
For some reason though, she never turns, seeming to indicate that Ellie is immune to the fungus.
Thevideo gamenever offers concrete answers either because the Fireflies scientists are never able to experiment on Ellie.
Having grown attached to the teen, he rescues her from the lab to save her life.
We’re about to hit a milestone in human history equal to the discovery of penicillin, he said.
The placenta allows mothers to pass antibodies on to their children, while also blocking some diseases.
Those would be passed on to the baby.
Or to put it another way… Ellie was vaccinated.
It seems the HBO series will be more explicit.
source: www.bustle.com