31.   The canarypox in the AIDS vaccine is a weakened form of canarypox virus that has been used to develop an experimental vaccine against rabies.

32.   The attendees agreed that it would be ethical to compare an experimental vaccine to a placebo, or inert substance, to determine efficacy.

33.   The blueprint also calls for creation of an international group to monitor and assess experimental vaccines.

34.   The experimental vaccine in the chimp experiments differs from most standard viral vaccines, which are derived from either dead or weakened viruses.

35.   The experimental vaccine is engineered so it cannot give HIV to a healthy person.

36.   The experimental vaccine was produced and frozen, Mr. Fair said, but his father never did get to use it.

37.   The experimental vaccines which have been developed elsewhere are at best only partially protective, many scientists say.

38.   The findings described in the Science papers may help explain how the experimental vaccine now being tested works.

39.   The experimental vaccine uses harmless laboratory relatives of flu bugs designed to trigger an immune response only when delivered in the nose.

40.   The experimental vaccine is manufactured by VaxGen Inc., of South San Francisco.