E-Mail IMAGE: A UC Davis study showed that those exposed to fact-checking labels were more likely to develop more positive attitudes toward vaccines than misinformation alone. The illustration shows an example of... view more Credit: Jingwen Zhang/courtesy illustration Social media misinformation can negatively influence people's attitudes about vaccine safety and effectiveness, but credible organizations -- such as research universities and health institutions -- can play a pivotal role in debunking myths with simple tags that link to factual information, University of California, Davis, researchers, suggest in a new study. Researchers found that fact-check tags located immediately below or near a post can generate more positive attitudes toward vaccines than misinformation alone, and perceived source expertise makes a difference.