"...The festering zombies that carry the zombie disease bacteria used to be largely restricted to the southern United States..."
Being a New Englander, it is my experience that most southerners would say the NORTHERN United Stated has the most zombies...:)
They’ve spread, for example, if you ever ask for road directions in Maine.
“Sorry, you can’t get there from here. Braaainnnsss.”
Or perhaps looked for a hot date in Northampton.
“Men are piiigs. Female Braaainnnsss.”