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.
无症状感染群中为数不少,一定时期和条件下也可排出甲肝病毒,此时带毒常活动自如,不易管理,因而作为传染源有重。
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.
无症状感染群中为数不少,一定时期和条件下也可排出甲肝病毒,此时带毒常活动自如,不易管理,因而作为传染源有重。
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