The virus itself might have mutated to spread more easily.

病毒本身可能已经变异，可以更容易地播。

It's common for viruses to mutate or change.

病毒变异是很常见的。

New versions that crop up when a disease naturally mutates.

当一种疾病自然变异时，就会出现新变种。

If the virus mutates further, it might become airborne.

如果该病毒进一步变异，那么它有可能通过空气播。

There is no state of their existence in human beings that is not constantly mutating.

在人体中，没有一种病毒态不是不断变化的。

Over 100 cases have been identified and other new variants are inevitable as the virus mutate.

目前已查明有100多例病例，随着病毒的变异，其他新的变种是不可避免的。

And also on whether the virus mutates to become more transmissible or lethal.

以及病毒是否会突变，变得更具或致命。

Next, they found that when one note mutates to another note, the changes tend to be small.

他们了解的第二件事，就是当一个音符变为另一个，歌曲整体变化往往很小。

Coronavirus mutates more slowly than flu.

冠病毒的变异速度比流感慢。

Has the virus mutated to become worse for kids?

病毒变异后对儿童影响更严重了？

Who has become more dangerous than a mutating plague.

他已经成了比变异的瘟疫更加危险的人物。

These diseases typically mutate as they circulate around the world.

这类疾病通常会随着在世界各地的播而产生变异。

As mischief has become easier, the hacker crowd has burgeoned and mutated.

随着内部不和升级，黑客组织生出新芽，产生巨变。

Experts say thousands of individual changes arise as the virus mutates and develops into new variants over time.

专家表示，随着时间推移，病毒变异和发展出新的变种，会出现成千上万的个体差异。

HeLa cells themselves actually have around 80 highly mutated chromosomes.

海拉细胞自己拥有大约八十条高度变异的色体。

In this case, the by-product was mutated red blood cells.

此处的影响是指发生变异的红细胞。

OK. Let's establish something that scientists say often, which is that viruses do mutate. We expect them to.

好。我们来谈谈科学家经常说的事情，即病毒确实会变异。我们预计病毒会变异。

The bad news, this year's vaccine isn't particularly effective. The CDC says it's because the flu has mutated.

而坏消息则是今的疫苗并非特别有效。疾控中心称这是因为流感变异所致。

And a third challenge is new variants of coronavirus. New versions that crop up when a disease naturally mutates.

第三个挑战是冠病毒的新变种。当一种疾病自然变异时，就会出现新变种。

Many viruses repeatedly mutate in an effort to stay alive and strong.

许多病毒反复变异，以求生存和保持强大。