51.   The current vaccines are made by genetic engineering techniques and cannot directly cause AIDS because they contain only a portion of the virus.

52.   The government is also seeking to make more vaccine.

53.   The vaccine is made from a fragment of the outer shell of the AIDS virus.

54.   The vaccine is made from a relatively nonvirulent strain of the anthrax bacterium.

55.   The vaccine was made by Medeva Pharma, which appeared to be producing it ahead of the competition.

56.   The vaccine was made through techniques of genetic engineering from a protein on the surface of the spirochete.

57.   The Vaccine Fund is also trying to solve a perennial obstacle by providing incentives to industry to make vaccines and sell them cheaply.

58.   The vaccine makers, who eagerly wait for the CDC to tell them what strains to attack, must calculate how much vaccine to make.

59.   The vaccine itself is made from killed virus.

60.   The vaccine was made by deleting genes from a version of the simian virus.