More practically, how can we keep ourselves safe from security threats like viruses when we're online?

更为实际点，当我们上网的时候面对诸如病毒等安全威胁的时候，我们该怎么办呢？

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An antibody is an immune system protein that helps seek and destroy invaders like viruses and bacteria.

抗体是一种免疫系统产生的蛋白质，起到寻找和破坏入侵的病毒和细菌的作用。

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Like viruses, such strategies take advantage of rapid multiplication to explode the message to thousands, to millions.

正如病毒一样，这种策略利用快速繁殖将信息爆炸式地传递给成千上百万人。

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The scientists found that the affected bees had a number of viruses from a group called picorna-like viruses.

VOA: special.2009.09.22

The study of immunology is the study of mechanisms that your body uses to protect itself from mainly from foreign pathogens like viruses and bacteria.

免疫学研究身体,采用何种机制来保护自身,免受外源病原体如病毒和细菌的伤害

耶鲁公开课 - 生物医学工程探索课程节选

If you can genetically engineer viruses like this and viruses have all those good properties as gene therapy vehicles that I described.

如果你能像我说的这样在遗传上改造病毒,加之病毒具备诸多优点,适合作为基因治疗的载体

耶鲁公开课 - 生物医学工程探索课程节选

So guarding against Melissa-like viruses in the future may involve trade-offs, observers say.

CNN: Stopping the next Melissa

Malware like viruses and spyware are a familiar and critical threat.

FORBES: Written by Kurt Roemer

They work a lot like viruses and trojans .

FORBES: Worm Attacks Coming For Google's Android - Kaspersky Lab