The measles outbreak in the hipster Melbourne suburb of Brunswick is worsening, with parents fearful of sending their children to parks or childcare centres. Many point the finger at anti-vaxxers, or parents who refuse to vaccinate their children based on unfounded health fears associated with vaccines. But how did the number of parents rejecting the best scientific advice as to what is best for their children reach critical mass?

Before we get to that point, it’s probably a good idea to go back and look at how influential vaccines were before the anti-vax movement found its voice.