The first HIV vaccine to be called a success has stood up to scrutiny after further analysis of the data was presented today in Paris, France.
However, the new analysis also confirms that the optimistic claims, first made in September and viewed sceptically at the time, are indeed very modest.
Last month's announcement of success (PDF) was made by researchers from the US Military HIV Research Program (MHRP). They reported that their vaccine reduced the risk of infection by about 31 per cent in a trial in Thailand.
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