FM1 virus was dropped nasally in Kunming mice, then the animals were control intraperitoneally injected extract of Radix isatidis, the antiviral effects of Radix isatidis were observed.

• 昆明种小鼠滴鼻传染流感病毒FM1后腹腔打针板蓝根提取液，观察板蓝根提取液的抗病毒感化。