OMG! Overtext! How long have I been sleeping?! OVERTEXT! Also, I'm a DESIGNER now?! Sweet! OVERTEXXXXXXT!
HO HO HO! Give me some money!
Nope. It just spreads, moving along to infect the population of the next location. The location it just left is back to normal, and the corporations are unaffected.
The 15 VP reward is the only pressing reason to go after it, or maybe if you do not want it spreading to a desired location for next turn. However, the three action cards needed to defeat it is a potentially hefty price.