So Ava is assumed to be "infected" but how it will play out, nobody knows as of now but... given the inspirations and influences the game comes from, I see a few outcomes:
1. Considering the infected that Ava was fucked by was different and died immediately, she could potentially be immune or have some sort of unique genetic trait that makes the virus slower or cease to function. So we could either get the plot of that she's the key/cure for humanity or not. However, probable side effects as the story plays out is that she's gonna be.... HORNY af which is gonna be both funny and hot xD
2. This is a bit of a stretch but Ava sounds very similar to another person called Aya, the main character from a game called Parasite Eve which was influenced by Resident Evil. Why does that matter? well in that game, there's also a "zombie" outbreak which is caused by Eve (the creator of the outbreak of parasites and the main antagonist). Now in that story, Eve eventually gets pregnant and gives birth to the perfect parasite iirc. So... if the creators took any inspiration from that, maybe Ava in Contagion Crisis, got knocked up with some special zombie or something and might give birth to the antagonist. Or hell, throw a curve ball, she might even become the antagonist.
3. or you know, she just dies in the next update xD and turns into some fucking necromorph abomination lmao.
On another note, this is still early in development but I'd suggest you make a harem route or something? Idk how but it would work given we just have two characters but just suggesting it since it would be different from the usual and typical female protagonist games where either the Fem MC becomes a slut due to sexual corruption or something or becomes a slave to one of the male characters. Just throwing that idea out there for something fresh and different yk. Not a lot of games where a FEM MC builds a harem xD.
Lastly, who's the "MC" of the game, is it Sarah or Ava? or are we getting the RE treatment and its both later down the line?
Also, I still love the title of the game.
Keep up the good work devs.