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Previous infections of bird probably provide some immunity from the current pandemic of H1N1 influenza virus, according to a study by the Institute of Allergy and Immunology, La Jolla United States published in the journal Proceedings of the National Academy of the Sciences’ (PNAS).

These findings may help alleviate some concerns that the H1N1 virus is so different varieties of seasonal flu that no prior population immunity.

The scientists, led by Bjoern Peters, used the database to compare what Epitope immunity markers of H1N1 influenza virus could be similar to the surface markers of previous seasonal flu strains.

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