The vaccine, ACAM-FLU-A, made by the biotechnology company Acambis, targets all strains of influenza A, the type responsible for a pandemic.
Preliminary results have shown that the vaccine is well tolerated and immunogenic.
Researchers also tested whether the vaccine could offer protection against avian flu.
Using ferrets, commonly used in flu research because they are susceptible to human and bird flu, they found that 70 per cent of those vaccinated were protected against the H5N1 virus.
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