Predictable. Doesn’t really bring anything new to the genre. Scenario is a rapid pandemic, that plays in out a matter of days, leaving between 2% and 8% survivors. Naturally, the story centers on the typical crusty, secretly heartbroken, hero who bugs out to the mountains. Because that where ALL survivors go, of course. The hero rounds up a small group of allies, and then fights off the rest of the remaining survivors, who have gone ferally evil.
The problem with this scenario is that the rapid pandemic progress would leave tons of resources behind in the stores and houses. There’s very little reason for the evil ones to think that taking from the heroes holed up in an isolated cabin on a mountain is easier than just busting into the nearest mall or grocery store. Once the scenario is setup, there’s no plausibility to the climax sequence.
None of these stories ever answer the question of WHY someone turns evil. WHY is taking from a fellow survivor easier than taking from an abandoned store or house? Write the story that explains that, and you might do something to elevate the genre.