1.But Mr Vardi also realised that instant messaging, then a novelty, would spread like a contagious virus.
尽管即时通讯当时还是个新鲜玩艺，Vardi却意识到它将像传染性病毒一样蔓延开。
2.ASF is a highly contagious virus infection of pigs that is usually lethal.
非洲猪瘟是猪的一种高传染性病毒感染，通常导致猪的死亡。
3.Worldwide, there are about 400 million chronic carriers of hepatitis B, a very contagious virus that causes inflammation of the liver.
在世界范围内，大约有400万B型肝炎，传染性病毒十分导致肝脏慢性炎症载体。
4.First, this is a very contagious virus.
首先，这是一种传染性极强的病毒。