Strange words at the end, unless in all that time her experiments worsened the outbreak she is in no way responsible for it, maybe in 3 months the author forgot she was just a combini employee?
Didn't like how she became a super scientist that started a possible cure with shit instruments from following simple guides when actual doctors were unable to do anything, we can say that when she was saved it wasn't even the same person, and not for the character growth.
Author even forced the twists, action and cliffhanger Walking Dead style, You-kun going outside to get some zombie materials and she making a lot of noise so that the zombie would force him back in the shop, from him being at a low risk she almost killed them both, true that at the end the author decided she was starting to act in a delirious way.
It had a decent start and it was going fine, but the author tried too hard to keep readers, I'm just thankful it wasn't 100 big chapters with this kind of developing.