The virus affects the areas where it entered the body.

With the gas mask on, the virus hadn't affected him yet.

Also, traditional viruses typically affect only specific computer operating systems.

The virus has been around since 2007 and only affects Microsoft computers.

Yes, a single virus could theoretically affect all these unrelated systems.

In fact, the virus affected only a few thousand machines worldwide.

It was the virus in the air, already affecting their swarms.

This virus affected over 45 million computers and was one of the world's most dangerous computer related disasters.

Then too, there are concerns about potential viruses, or spam, affecting the system.

The virus affects the host's central nervous system with eventually fatal effects.