11.   Jonas Salk grew polio virus in live animal cells, separated out the virus, then killed the virus with formaldehyde.

12.   Mills also said that Leavitt believed the source who led the FBI to them had equipment to kill the virus.

13.   Once the virus is analyzed, code can be written to kill the virus.

14.   Others are made by killing a virus.

15.   Since RNA has to uncurl to replicate, the process kills the virus.

16.   So is it time to provide computer networks with immune systems that kill viruses?

17.   Tests showed that these women had very high levels of cytoxic T cells, which stimulate the immune system to kill viruses.

18.   That would induce production of killer T cells by the immune system that would then attack and kill the virus throughout the body.

19.   The method is in essence the reprogramming of a virus, changing its natural target so that it kills another virus.

20.   The medicines made from the plasma were probably safe for patients, because the manufacturing process should have killed the virus, doctors said.