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Signs the vaccination debate is getting even more polarising.
Prime Minister Jacinda Ardern was forced to abandon an outdoor press conference in Northland after being heckled by protestors.
Massey University Sociology Professor Paul Spoonley told Heather du Plessis-Allan it's concerning behaviour.
He says anti-vaxxers are feeling more excluded and more cornered.
“The protests and violence continue to ramp up.”