The internet, and especially social media, is exploding with information; not all of it is reliable or true. In fact, there is a growing amount of misinformation online, especially about science and health topics, including vaccines. Deciding what information to trust, and from whom, can be difficult. But there are some helpful tips you can use to help navigate the swell of information online and separate fact from fiction. This fact sheet outlines key characteristics that may signal a source or piece of information is trustworthy or not.