Adrenal Surge is a Tier 8 symptom exclusive to the Necroa Virus DLC. It causes mutation of the adrenal cortex, which increases the alertness and aggression of zombies due to an overproduction of adrenaline.
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Adrenal Surge is a Tier 8 symptom exclusive to the Necroa Virus DLC. It causes mutation of the adrenal cortex, which increases the alertness and aggression of zombies due to an overproduction of adrenaline.