現時点で、H5N1株は簡単には人間に感染せず、また人間同士の間では全く感染拡大しない。
(S (S (PP (BASENP (NN 現時点)) (IN で)) (COMMA 、) (S (PP-SBJ (BASENP (FW Ｈ) (NN ５) (FW Ｎ) (NN １) (NN 株)) (IN は)) (VP (VP (ADVP (ADVP (NN 簡単) (INRB に)) (IN は)) (VP (PP (BASENP (NN 人間)) (IN に)) (VP (VP (NN 感染) (VBO せ)) (VP (MDV ず))))) (COMMA 、) (VP (ADVP (RB また)) (VP (PP (PP (NP (PP (BASENP (NN 人間) (NN 同士)) (IN の)) (NN 間)) (IN で)) (IN は)) (VP (ADVP (RB 全く)) (VP (VP (BASENP (NN 感染) (NN 拡大)) (VBV し)) (VP (MD ない))))))))) (PERIOD 。))