The following model uses Philadephia and a cross country passenger who is infected before landing in San Francisco.
I’m still crunching the numbers, but it looks like with a moderately high infection rate the states will be decimated in less than sixty days.
The center of the country survives the longest, but I haven’t modeled a travel model or US military response to the infection yet. The coasts will most likely be nuked once the military realizes they can’t control the undead outbreak before it spreads via normal containment mechanisms. I’ll model a few scenario’s of varying responses and see how it comes out, but in any case, the highest population centers are going to be munched on by the undead first.
I hope Santa brings you a few of the undead fighting items you’ve asked for.