51.   Two months later, Jenner inoculated the boy with smallpox virus, but the boy did not get sick.

52.   Viral agents include smallpox virus, Marburg virus, Lassa virus, Junin virus and many others.

53.   Were a terrorist to disperse the smallpox virus, for example, populations that were once universally vaccinated would now be horribly vulnerable.

54.   WHO officials want to kill the remaining smallpox virus, which is locked away in high-security labs in Atlanta and Moscow.

55.   A terrorist attack with the smallpox virus would be more dangerous than anthrax because it is contagious, Rock said.

56.   After prolonged scientific wrangling, the World Health Organization agreed Friday to wipe out all traces of the smallpox virus in the next three years.

57.   In that exercise, officials pretended that Iraqi-financed Afghan terrorists were spraying the smallpox virus into shopping centers in Oklahoma City, Philadelphia and Atlanta.

58.   Nabarro warned that there was evidence that smallpox virus might have fallen into the hands of those ready to use it as a weapon.

59.   Next comes an immune system booster, such as a smallpox virus that has been rebuilt to carry some of the HIV genes.

60.   That raises the possibility the smallpox virus could get into the hands of those who would try to use it in bioterrorism weapons.