Zadie just wants to distract herself from the zombies. She goes to the salon to escape from the news stories, but the subject just keeps following her as she deals with the residents of her upper class small town who don’t trust the new vaccine or see the need for any sort of zombie protection. After all, Chester isn’t that kind of town.
I think zombies work best as an allegory, and they work particularly well in this story about the early days of a zombie apocalypse. This is a sharp commentary on how people, especially the well-off, assume that bad things only happen somewhere else, whether that’s another town or another country.
The undercurrent of racism serves to both ground the story in reality and further define the sort of town Chester is. As a brown-skinned school teacher in a mostly white town, Zadie is never sure if she can trust the intentions behind the smiling faces she sees everywhere. These aren’t the sort of people to express overt racism, but they express themselves in small, subtle ways that neither she nor the reader can mistake.
All in all, this is a thoughtful zombie story whose themes are highly relevant to our times.