system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] If Superman is completely immune to all terrestrial viruses, how come Poison Ivy can easily control him?
gpt
Because her method of control isn't via a virus, it's a mind control pollen. Superman is vulnerable to the Green, and even though her control over it is limited, it's sufficient enough for her to hijack both him and his internal flora.