71.   Critics said it was unethical not to provide protection against the disease when an effective vaccine was available.

72.   Currently, only a single AIDS vaccine is in the advanced stages of testing.

73.   County health departments have specifics on when vaccines will be available.

74.   Developed by South San Francisco-based VaxGen Inc., the vaccine is the first of its kind to reach Phase III human clinical trials.

75.   Dr. Una Ryan, chief executive officer of Avant, a biotechnology company in Needham, said a preventitive vaccine would be a better approach than handing out antibiotics.

76.   Developing an AIDS vaccine is one of the greatest challenges in science.

77.   Dr. Treanor said at least several more years of study were needed before the vaccine would be available to the public.

78.   Edible vaccines could be especially important for developing countries, which often lack resources to distribute and preserve injectable vaccines.

79.   Edible vaccines might not be only for poorer countries.