Just look at cold and flu viruses.

看看感冒和流感病毒就知道了。

(We) don't have any insects here or any flu viruses.

(我们)这里没有任何昆虫或流感病毒。

Coughs and sneezes spread flu viruses.

咳嗽和喷嚏会散播流感病毒。

I-I-I basically mixed this with a more contagious flu virus.

我加入了一种更具传染性的流感病毒。

Some germs are tricky and change over time, like flu viruses.

像流感等病毒随时都在发生变化。

Scientists put a flu virus gene into a virus infected insects.

科学家把流感病毒基因放进受病毒感染的昆虫体内。

The insect cells churned out flu virus protein to make vaccine.

昆虫细胞生产出流感病毒蛋白，然后制作成疫苗。

But it's not the nasty flu virus you've heard about.

但这不是你听说过的讨厌的流感病毒。

I'm a type of flu virus that spread worldwide in 2009.

我是一种流感病毒，曾在2009年蔓延到全球。

But the flu virus having disabled the antibodies, may instead attack lung cells.

但能使抗体失效的流感病毒可能会袭击肺细胞。

That is the traditional understanding of how the body fights the flu virus.

这是传统上对身体对付流感病毒的理解。

Doctors said it does not pass from person to person like a flu virus.

医生说它并不像禽流感那样在人与人之间传染。

The scientists removed parts of a protein on which the flu virus normally depends.

科学家去除了流感病毒通常依赖的部分蛋白质。

It is here that this flu virus reaped its first 48 victims.

正是在这里，该病毒第一次感染了48人。

The bulk of the chickens had to be killed because of the bird flu virus.

由于禽流感病毒，大部分的鸡都不得不被宰杀掉。

National centers around the world collect spreading flu viruses and observe how they change over time.

世界各地的很多国家中心收集了传播的流感病毒，也观测了这些病毒随着时间的流逝会发生怎样的变化。

First, the flu virus encounters a new host and makes its way into their respiratory tract.

首先，流感病毒遇到了新的宿主，并进入他们的呼吸道。

Human flu viruses are covered in proteins adapted to bind with matching receptors on human respiratory cells.

人流感病毒覆盖着蛋白质，这种蛋白质可以与人类呼吸细胞上的匹配受体结合。

So one goal has long been to create a vaccine against all variations of the flu virus.

因此，我们长期以来的目标是研发出一种可以对抗流感病毒所有变种的疫苗。

When you think about cold viruses or flu viruses, oftentimes they act a bit like a powder.

当你想到感冒或流感病毒, 通常它们有点像粉状末。