A 'cheapfake' Dr. Oz poster went viral on social media. The fact check did not.

In late August, a photo of U.S. Senate hopeful Dr. Mehmet Oz went viral. In it, Oz stands surrounded by what appears to be restaurant workers, one of whom is holding an “OZ” sign perpendicularly so that it reads “NO.” It turned out to be a doctored image — but fact-checking didn’t surface until …