腹泻和呕吐是粮食的最常见的食物传染疾病的症状，通常只持续几天。
Diarrhea and vomiting are the most common symptoms of food-borne illness, and typically last only a few days.
不过，带有分子诊断方法的来临，在食物传染疾病爆发里的病毒的角色正开始被理解。
However, with the advent of molecular diagnostic methods, the role of viruses in foodborne disease outbreaks is beginning to be understood.
虽然一些细菌会引起食物中毒或传染疾病给人类，但大多数细菌对人类无害，而其中有许多反而有益。
Though some bacteria Can cause food poisoning and infectious diseases in humans, most are harmless and many are beneficial.
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