User blog comment:FangzV/Possible Wikia Virus?/@comment-75.110.88.74-20101011080558

Anonymouse is familiar with this. The virus isn't on any of the Wiki's, it is instead hiding inside the Wikia advertising banners/buttons/popups. This would be why people are recommending ad-block to you. If you stop the ads from opening, then you stop the virus hidden inside them as well.

If you've been browsing the wiki with ad blockers then your safe, and if you have opened ads before I recommend Malwarebytes as a good piece of free scan&removal software.

Also of note, many malware scanners and removers work best if you are disconnected from the internet. Some malware can not be removed until you do actually.