Spiderpox is a disease that occurs in the episode Spidermandy.
Symptoms In Spiders
For Spiders, Spiderpox functions similarly to chickenpox, producind swollen spots all over the body.
Despite this, it is able to be spread to humans with much more devestating effects.
Symptoms In Humans
Humans suffering from Spiderpox become highly aggressive spider-like creatures with human heads sporting the spots seen in spider victims. They will become very hostile towards others.
Cure
The only known cure is magic spider venom, which in the episode was retrieved from Jeff.