Despite the world's best efforts, Zika is mysterious. There's a lot we still don't know about it, with even some big things still unconfirmed. Worse still, a cottage industry of Zika conspiracy-theory websites have been created over the past few months, quickly spreading inaccurate information.

As such, it's not surprising that the average reader may be unsure what they actually know about Zika. And given the seriousness of the situation, that's a concern. Zika is perhaps the most concerning health issue in the world right now: A public understanding of what it is and the danger it actually poses will be key to preventing it from getting worse.