On Oct. 5, 2013, passengers on flight Air China CA1268 to Beijing experienced severe diarrhea and vomiting after eating expired biscuits, Beijing Evening News reports.

One family, surnamed Zhang, had reportedly noticed that the biscuits had been expired for four days and reported them to a crew member, who agreed to replace hers but not to alert the other passengers. About half an hour later, a bout of diarrhea and vomiting swept through the cabin, affecting at least 30 people, who formed massive queues in front of the lavatories.