These offer a big improvement over treatment based on injected interferon .
相比基于注射干扰素的治疗，这是一个很大的进步。
But in patients interferon failed to cure solid tumors , and melanoma responded only occasionally .
但是，在给患者使用时，干扰素未能治愈实性肿瘤，并且对黑素瘤只是偶尔起效。
It prefers to infect cancer cells because they turn off the antiviral protein interferon and turn on signalling molecules that attractvaccinia .
疫苗偏向传染癌细胞，因为它能关掉蛋白质干扰素的活动，打开发信号的细胞，以吸引牛痘。
Experiments showed interferon gamma , an immune protein secreted by lymphocytes , was responsible for activating b7-h1 , allowing tumors to escape immune-system attack .
实验表明，激活b7-h1的是淋巴细胞分泌的免疫蛋白干扰素γ，从而导致肿瘤逃掉了免疫系统的攻击。
Doctors can treat chronic cases with interferon and antiviral drugs . But these medicines cost too much for most of the world 's poor .
