Packaging first became a major issue with outbreaks in China linked to wholesale food markets, including one in June on the outskirts of Beijing. That prompted the removal of smoked salmon from supermarket shelves and has snowballed into multiple cases nationwide involving chicken, beef and seafood from nearly two dozen countries. At some supermarkets, imported meat now comes with a sticker declaring it to be virus-free.
Infections among freight handlers have also placed suspicion on packaging. Person-to-person transmission hasn't been ruled out, however, and China has yet to release evidence that packaging was indeed the route of infection.
In a statement to The Associated Press, the World Health Organization said cases of live viruses being found on packaging appear to be "rare and isolated." While the virus can "survive a long time under cold storage conditions," there is no evidence of people contracting COVID-19 from consuming food, it said.