WELLINGTON/BEIJING : coronavirus, spread of coronavirus, coronavirus transmission, frozen food packaging, New Zealand, coronavirus for freight, frozen chicken wings, COVID-19 from food, food packagingChina reported several cases of frozen food packaging contaminated with the novel coronavirus this week, while New Zealand said it is investigating the possibility that its latest COVID-19 cases could be traced to imported freight.Here's what has happened and what experts say about it:What's happened:New Zealand reported its first COVID-19 cases in more than three months on Wednesday, prompting a swift reimposition of movement restrictions.