The Fear the Walking Dead pilot answered several questions, namely: 1) Will it really be different from The Walking Dead (Yes); 2) can it continue the success of The Walking Dead (Yes); and can it do so without damaging the mothership (probably).
However, one question that wasn’t addressed, and that may never be addressed, is arguably the most important question from in the series: How did Gloria contract the zombie virus?
In case you’ve forgotten, here’s Gloria:
There’d been some suggestion last week (from the actress who plays Gloria) that she would be Patient Zero. That’s certainly not the case nationwide (Tobias reported that there were reports of a mysterious infection in at least five other states), but it might be the case for Los Angeles. She could’ve been the city’s Patient Zero.
Now, if you’re an epidemiologist, it’s your job to trace an epidemic back to its source, as Patient Zero is often who holds the key to discovering a cure. Find out how she contracted the virus, and maybe you can develop a solution. So, if you’re an epidemiologist in Los Angeles knowing what we know watching the series, you’d want to trace the infection back to Gloria.
But that’s where it gets tricky, because there are a few possible ways she contracted it. The first, and least likely, is that she was infected by the drugs she was given — this is fairly easy to rule out because Nick took the same drugs and, so far as we know, wasn’t infected (likewise, those in the other states with the infection probably didn’t take the same drugs).
The second scenario is that she was infected by another zombie in the church drug den. If so, where did that walker come from? And why did he infect Gloria and not Nick, who was passed out next to Gloria?
The third and most likely scenario is that she overdosed on the drugs she was given and died, and she was then reanimated as a zombie.