Vanilla is a product of Lussumo:
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I mean the start is taken straight from 28 days later,
Rip van Winkle, Buck Rogers, Captain America...all variations on Man Wakes Up To Find World He Does Not Understand and Never Made.
For what it's worth, Kirkman said he didn't see the movie till the book was at the printer's, or words to that effect.I don't remember any statements about 28 Days Later specifically, but he's always saying that he goes out of his way to not see or read any other contemporary zombie stuff that might influence the series.