What role does the 'zombie blood' play in the Marvel Zombies' abilities?

‘Zombie blood’ is the key to the transformation and sustenance of Marvel Zombies. It’s a highly potent, rapidly mutating virus that grants them enhanced strength, speed, and regenerative abilities. However, it also fuels their hunger and accelerates their descent into madness. The more they consume, the stronger they become, but the further they stray from their former selves.