Further research has shown that caterpillars become virtually immune to the wilt virus as the trees on which they feed respond to increasing defoliation.

进一步的研究表明，毛虫对萎蔫病毒几乎具有免疫力，因为它们赖以为生的树木会对越来越多的落叶做出反应。

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Research on influenza pandemics and pandemic viruses increased considerably following the first human cases of infection with the H5N1 avian influenza virus in 1997.

在1997年发现首批人患H5N1禽流感病毒感染病例之后，大大加强了对流感大流行和大流行性病毒的研究力度。

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Three tests conducted on 10 May by the Cairo-based US Naval Medical Research Unit 3 (NAMRU-3) confirmed the child’s infection with the H5N1 virus.

设在开罗的美国海军第三医学研究处5月10日进行的3次检测确认了该名儿童感染H5N1病毒。

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Iran's computer emergency response team, known as Maher, a branch of the telecommunication ministry, said on Tuesday that it was sharing research information on the virus for the first time ever on its website.

WSJ: Cyberattack Hits Iranian PCs

Chinese and World Health Organization officials said Wednesday in Beijing that they plan to boost surveillance and research on the H7N9 virus to understand its spread and potential for human-to-human transmission.

WSJ: Bird Flu Found Outside China's Mainland

Christopher Gadd, of the HIV information service NAM, said the latest research had been carried out not on HIV, but on the virus that causes the respiratory condition Sars.

BBC: NEWS | Health | How HIV can sabotage human cells