It's a type of Yahoo! Alert, which is a personalized notification service that alerts you of relevant content via email, instant messenger, pager, or cell phone. Setting a health news alert will notify you when new news articles are available that fit your criteria. For example, if you want to monitor diabetes treatment news, you could set the alert notify you when the latest news stories match the criteria of "diabetes treatment." You will need to sign up for a Yahoo! account (if you don't already have one) before you can set up your Yahoo! Alerts.