He says normally a protein in healthy immune cells causes the cells to die after they attack an invading virus or bacteria.

VOA: special.2010.05.19

The tissue may contain evidence of the virus or bacteria that caused the person to die.

VOA: special.2010.06.29

"People tend to congregate and be together and the way the common cold virus is transmitted from one person to another is through handshakes,through sneezing, or coughing on one another."

VOA: special.2011.04.20

And how the cells shutdown is they actually die Harris Perlman says a protein in healthy immune cells causes them to die after they attack an invading virus or bacteria.

VOA: special.2010.03.16

Many people can live with the virus and never get sick, but 25 percent of those infected eventually develop severe liver damage or cancer.

VOA: standard.2010.07.26

and with it, the virus or bacteria that may have caused the person to die.

VOA: standard.2010.05.05

Angus Nicoll of the European Center for Disease Prevention says that at this point no one knows whether the virus will become more or less virulent in the months ahead.

VOA: standard.2009.04.30

A growing number of countries are either discouraging or banning travel to and from Mexico, where the first cases of swine flu were reported and where the virus is suspected in thousands of infections and more than 150 deaths.

VOA: standard.2009.04.30