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New AIDS Vaccine effective in Monkeys Researchers from Harvard Medical School have shown that monkeys given an experimental new AIDS vaccine have survived with no signs of illness despite exposure to lethal doses of virus. This approach could keep monkeys healthy for more than 1-1/2 years after they receive a particularly lethal form of the virus that usually kills within a few months. After 600 days, there was no evidence of disease in vaccinated monkeys. Of the animals given the virus without vaccine protection, 87 percent have contracted AIDS and three-quarters have died. None of the animals that were fully vaccinated has gotten sick.
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