Why are port workers' vaccination rates falling short?

Delta is looming large on the horizon, so why are so many workers at our ports - one of the most vulnerable entry points - so reluctant to get the vaccine. Just last week the Port of Tauranga faced a real Delta scare, yet many of the affected workers hadn't been vaccinated. Susie Ferguson talks to Tauranga Port CEO Leonard Sampson about this, along with Port Company CEO chair Charles Finny. What happens if there's a core group of workers who refuse the vaccine?