41.   Participants will also learn how to use the special two-pronged needle required to administer smallpox vaccine.

42.   People with lowered immunity can get very sick from the smallpox vaccine, which is made from vaccinia, a virus related to the one that causes smallpox.

43.   Racing against terrorists who may be planning more biological attacks, federal officials want a new smallpox vaccine manufactured within a year, faster than any vaccine in memory.

44.   Scientists are working on a new, safer version of the smallpox vaccine, but it is far from ready.

45.   Since it is not a live virus vaccine, like the smallpox vaccine, it cannot give a person ebola.

46.   Smallpox vaccine is still needed at CDC for scientists who work with the virus.

47.   Smallpox no longer threatens the world because a live-virus smallpox vaccine has eliminated every known reservoir of that virus throughout the world.

48.   Smallpox vaccine can be used not only to prevent infection with the smallpox virus but also to treat people exposed to the virus, and thus contain an epidemic.

49.   Smallpox vaccine was traditionally prepared in cows.

50.   Smallpox vaccine is not licensed now and the government owns all or most of the existing stocks.