It works in all the different ways that viruses can work.

Once we have the idea of how the virus works, it isn't hard to protect ourselves.

Here are two examples to help you understand how e-mail viruses work.

They didn't understand that eventually the virus would work its way in anyway.

Scientists have learned a lot about how viruses work and how to design drugs to stop them.

Take a look under the microscope to see how cells, viruses and bacteria work.

If you think about how a virus works, it makes sense that we're most contagious when our symptoms are at their worst.

No, I don't have the original virus mutant he worked with.

I had to take advantage of the possibility that the virus might work, even if only temporarily.

Because sometimes the virus worked, he said; it remade its victims, gave them powers.