An important factor of resulting tobacco virus disease is insect vectors.

媒介昆虫是烟草病毒病的重要成因因子。

youdao

Marburg virus disease occurs very rarely and appears to be geographically confined to a small number of countries in the southern part of the African continent.

马尔堡出血热的发生极其罕见，并且似乎在地理上局限于非洲大陆南部少数国家。

youdao

Both cattle and chickens raised for meat are often fed the type of feed that transmits the virus that causes the disease.

用于食用的牛和鸡经常被喂食会传播病毒的饲料，该病毒引起这种疾病。

youdao

Swaziland is said to have the highest known rate of infection for the virus that causes the disease.

VOA: special.2009.05.04

So, that was a naturally occurring attenuated virus that could be produced into a vaccine that didn't cause the disease.

因为天花病毒存在天然的衰减病毒,这种衰减病毒可以用来,直接生产不致病的疫苗

耶鲁公开课 - 生物医学工程探索课程节选

But unlike the Cowpox virus, vaccinea, that we talked about before, this is the real disease causing agent.

但是同我们之前曾讨论过的,牛痘病毒疫苗的不同之处在于,这是可以直接致病的病毒

耶鲁公开课 - 生物医学工程探索课程节选

He has recently developed a research interest in understanding the securitization and structural violence of the Ebola Virus Disease in Africa.

UNESCO: Professor David J. Francis

The researchers say no direct link between the virus and disease has been established.

BBC: The moggie menace

Researchers also found how the Marek's disease virus may also encourage tumour growth.

BBC: Chicken virus study sheds light on human cancers