The authors tested 8 different vaccines for mercury and found it in a concentration of 10 ppb in one of them only (Infanrix Hexa). Then they tested three other Infanrix Hexa vials and found mercury in a similar concentration again. The authors note that although this concentration is well below the established safety limit (2 μg/ml), the results of this study suggest inaccuracies in official documents and public communications claiming that the vaccine contains no mercury. They call for an urgent solution of this issue.
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