其二是MDV在病毒性肿瘤发生和疫苗预防恶性肿瘤研究领域的重要地位，因为MDV是第一个能用实验证明的具有致肿瘤作用的疱疹病毒；
The other is the important position of MDV on tumorigencity and vaccine prevention from malignant neoplasm. Because MDV is the first herpesvirus proved to be oncogenic with experiment.
肿瘤作为危害人类健康、导致人类死亡的主要原因，与病毒性疾病、老年性疾病并称为现代医学的三大挑战。
As the main reason of destroying human's health and leading to death, tumor together with Viral disease and Senile disease are considered as three challenges of modern medicine.
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