Twitter fights vaccine misinformation with new search tool

If you search for tweets related to vaccines as of Friday, the first thing you see on Twitter is a post from the United States Department of Health and Human Services pointing you to reliable health information instead of anti-vax misinformation.
Last week, Twitter announced that it would be launching a new tool in search that would prompt users to head to vaccines.org, which is run by officials at HHS. Over the past few months, social media companies like Facebook and Twitter have faced intens