I enjoyed that more than I was expecting to. While I love a good dystopian setting, the YA genre generally doesn't do much for me which is probably why my expectations were quite low. And to be honest, the moody overreactions did annoy me on several occasions and the endless monologuing got a bit much at times. However, there were enough mystery elements and suspense to keep me interested throughout, so It's fair to say that while it had its issues, it was a fun ride regardless.
The world-building was quite good with a nice balance of information about the (very silly sounding) virus and its effects on the world. Just like the characters, we didn't know everything that happened, but we knew enough to enjoy the story. In terms of creativity, I liked how the virus affected people and the consequences on the world because of it, but there were a tad too many inconsistencies for my liking. Things like how the virus started and spread didn't line up and the seemingly random mutations that they created in people were a bit far fetched. With all that vagueness also came the issue of the infected people acting exactly the way the author needed them to act in certain scenes.
As for the characters, they were alright. There were 2 main pov characters and both were your typical, angsty teenage archetypes. It's pretty much what you'd expect from a YA book and to be honest, I wasn't ever really worried about them, nor did I particularly care anyway. That's not to say they were bad or poorly written. They were perfectly fine for the book which was very much story-driven. The rest of the cast was decent as well with some outliers that I didn't buy, but which worked for the story nonetheless.
I liked the concept of how the infected people were affected mentally and the subsequent interactions with them. The setting was also well thought out, although it did seem a little too convenient for certain scenes. So overall, the writing was decent and for the genre and target audience, I'd even argue it was spot on. Unfortunately, the number of smaller issues did tally up for me towards the end.
So if you're a fan of the YA genre, I'd definitely recommend this. The dystopian elements are nicely executed and the story has enough mystery and tension to also appeal to people who like that in their stories. It has its faults, but if you can get into the story as I did, they're not that distracting.