Ms Hennessy released the messages sent to her that called her a "whore", "dirty dog" and one that said, "hope you get cancer soon".

She said some of the messages she would not disclose because there were "incredibly distressing in terms of their sexual and violent nature".
Anti-vaxxers 'not peace-loving hippies'

Ms Hennessy said she wanted to highlight the type of people involved in the anti-vaccination campaign.

"I want to shine a light on the fact that the anti-vaccination movement, is not a peace-loving group of hippies," she said.

"They are an organised movement, largely stemming from the United State of America that are hell bent on misleading parents that vaccinations are unsafe.