1.   Computer users from around the world reported that the virus had invaded their systems.

2.   In the thirties some widely published accounts made popular the notion that the virus invaded through the nerves of smell.

3.   The polio virus first invades the intestines, where it lives, replicates, and usually establishes harmless infection.

4.   And it occurs not only on the skin, but internally too, when viruses invade the body or the stomach is irritated by spoiled food.

5.   And just last month I learned the dreaded virus has invaded the blood of another friend.

6.   AZT counteracts the enzyme reverse transcriptase, which is involved in the process in which the virus invades a cell.

7.   In some cases, though, the virus will invade the lungs or brain and cause an inflammation or bacterial infection that a weakened immune system cannot fight.

8.   Infection occurs when the virus invades the respiratory tract and then the immune system.

9.   Q. Is it possible for viruses to invade your computer through instant messaging?

10.   A fashion virus has invaded the Milan runway, turning everything in its path to vegetarian green and purple, and stripping styles to the bare minimum.