The virus Alert system keeps an eye on the websites customers visit to stop them accidentally going to places riddled with viruses.
病毒预警系统会监测客户浏览的网站以防止其意外地链接到充塞着病毒的处所。
Swine flu has become the world's first official pandemic in 41 years after the world Health Organisation raised the alert level on the H1N1 virus from phase 5 to 6, the highest on the scale.
世界卫生组织宣布将甲型H1N 1流感病毒的警戒级别由5级提升至最高级别6级，至此，猪流感已成为41年来世界上第一个正式的全球大流行病。
But I insist that the virus is still present, that we need to remain on alert and the resumption of activities will be little by little, not all at once.
但是我坚信流感现在仍然活跃，我们需要继续提高警惕，病毒的反扑是一点一点体现出的，而不是一下子爆发。
WHO strongly recommends that, in areas where infection with the H1N1 virus is widespread, pregnant women, and the clinicians treating them, be alert to symptoms of influenza-like illness.
世卫组织强烈建议，在H1N1病毒感染广泛存在的地区，孕妇以及医治她们的临床医生应警惕流感样病症。
As investigations have produced no evidence that the H5N1 virus is spreading easily from person to person, WHO has not raised its current level of pandemic alert.
由于调查未产生依据说明H5N1病毒已容易发生人际传播，世卫组织未对其当前的大流行预警级别进行升级。
The present WHO level of pandemic alert remains at phase 3: human infections with a new virus subtype are occurring, but the vast majority of these infections are acquired directly from animals.
目前世卫组织的大流行预警级别仍然为第三阶段：人类感染新亚型病毒，但是这些感染中的绝大多数是直接从动物那里获得的。
We are - and we must remain - alert to every hint that the virus may be changing its behaviour.
我们时刻、而且必须对该病毒可能改变其行为的任何线索保持警惕。
The us went on high alert and vaccinated thousands of people - but the virus did not spread readily enough to maintain an epidemic, and fizzled out.
当时美国给予高度关注，并给好几千人注射了预防针，但这种病毒并没有迅速扩散，没有构成流行病，后来也就慢慢消失了。
The World Health Organization has raised its pandemic alert level for the deadly swine flu virus, signaling that the infection is spreading among humans in community-level outbreaks.
世界卫生组织提高致命猪流感病毒的疫情警戒级别，显示这种病毒正在社区中人与人之间扩散。
Even in Sierra Leone, where health officials were on high alert, the virus spread undetected for at least a month, sparking numerous chains of transmission that rapidly multiplied.
塞拉利昂的卫生官员保持着高度警惕，即便如此该病毒在没有被发现的情况下至少传播了一个月，触发了多个很快成倍数增长的传播链。
The best way to protect your computer is to install virus protection software that's always alert and looking out for harmful intruders.
保护你电脑的最佳办法是安装防病毒软件，那么它就会一直保持警惕和寻找有害的入侵者。
The WHO raised the alert level to Phase 4, meaning there is sustained human-to-human transmission of the virus causing outbreaks in at least one country.
世卫组织警戒级别提高为4级，这也意味着由病毒引起持续的人际之间的传播至少会在一个国家引起暴发。
The World Health Organization raised its global alert level on the spreading swine flu virus again.
世界卫生组织再次提高正在传播中的猪流感的警告级别。
Experts say the virus is hard to delete and advised mobile phone users to stay alert.
专家表示，这种病毒很难删除，建议手机用户保持警惕。
Experts say the virus is hard to delete and advised mobile phone users to stay alert.
专家表示，这种病毒很难删除，建议手机用户保持警惕。
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