The gene variant associated with the highest B12 levels has previously been determined to protect the stomach from infection by the Norwalk virus and ulcer-causing H. pylori bacterium.

先前发现与B12最高水平相关的基因变异可以保护胃免受诺沃克病毒的感染，和幽门螺旋杆菌引起的溃疡。

youdao

Conclusion Healthy Norwalk virus carriers were present in school canteen workers in Meixian and could be the hidden risk of Norwalk virus gastroenteritis outbreak.

结论梅县学校食堂厨工存在诺瓦克病毒健康携带者，学校有爆发诺瓦克病毒胃肠炎的潜在危险。

youdao

Objective To investigate the infection status of Norwalk virus in school canteen workers in Meixian and provide the scientific basis for Norwalk virus gastroenteritis control and prevention.

目的了解梅县学校食堂厨工诺瓦克病毒感染情况，为诺瓦克病毒胃肠炎预防控制工作提供科学依据。

youdao

The Veedam's failing grade is uncommon in the cruise ship industry, an industry that has tried in recent years to keep on-board environments sanitary after illnesses like the Norwalk virus sickened passengers and caused a public relations nightmare.

CNN: Cruise ship fails CDC health inspection

According to the Centers for Disease Control, associated deaths rose from 7, 000 to 17, 000 between 1999 and 2007. 800 of those were from the infamous Norwalk Virus, so contagious that turns entire cruise vessels into floating vomitoria.

FORBES: In D.C., 'Skip The Bag, Save The River' Is Making Us All Sick