There are quite a number of asymptomatically infected in the population, and they may discharge hepatitis A virus at certain times and under certain conditions.
无症状
在人群中为数不少，在一定时期和条件下也可
出甲肝病毒，但此时带毒常活动自如，不易管
，
作为传源有重要意义。
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We also didn't really appreciate the extent of asymptomatic transmission and the fact that this virus was being passed asymptomatically by some people who had no symptoms whatsoever while their relative might be critically ill in ITU.
我们也没有真
到无症
传播的范围，以及有
人完全没有症却在无症
传播病毒，而他们的家人可能在重症监护室里危在旦夕。
