Scientists working in Switzerland, Vietnam and the United States say they have isolated antibodies that they hope could offer protection against several different strains of the virus simultaneously. Antibodies are used by our immune system to neutralise bacteria and viruses – in this case, the scientists have isolated antibodies that bird flu survivors in Vietnam produced to fight off the disease. Professor Antonio Lanzavecchia, at the Institute for Research in Biomedicine in Switzerland, says the antibodies have already proven effective in the lab and in mice and he is confident that they could be used in humans.

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