But if a virus is killing the mammals, the epidemic will not be easy to control.

In 2001, a virus has killed 99.99% of the females on Earth.

Well, if you're going to die anyway, what difference does it make whether a virus or a cancer kills you?

In five years the virus will become active and kill everything.

The virus has killed a large portion of the inhabitants.

So far, the virus has killed more than half of those infected.

The virus has killed more than 125 people between 1993 and 2007.

The virus killed more than 400 turkeys in a matter of hours on one French farm.

In isolated human populations, the virus killed at even higher rates.

The virus has already killed more than 100 people.