(Click for a bigger image)As he explained to me, it depicts someone (foreground) getting bitten in the arm by a zombie. You can just make out the zombie's head on the person's left arm. I'm assuming those black squiggles represent an abundance of gore. I have no idea what those blobs are falling from the sky--perhaps it's hailing. Or maybe they're other zombies. In the background is a house.
I'm thinking he was inspired by NOTLD. In any event, because his dad just so happens to run a horror blog, Wee-Sol now enjoys the fortune of having his artwork put out there for the world to appreciate...