The concentration of acid in vomitus or aspirate need not reach this limit. 呕吐物或吸引液内酸的浓度不需要达到这一程度。
The infection can spread through the consumption of contaminated food or direct contact with the vomitus or excreta of infected persons. 此类感染可以由进食受病毒污染的食物及直接接触病人的呕吐物或粪便而传播。
