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SciClone Pharmaceuticals said Monday that a second round of testing showed again that patients who used its vaccine booster combined with a swine flu vaccine had better resistance levels.

In January, SciClone first reported tests using its Zadaxin booster and Novartis AG's vaccine Focetria.

SciClone and its partner Sigma-Tau said an immune response was achieved in 93 percent of patients who received a low dose of Zadaxin and 94 percent of patients who received a bigger dose. That compares to 77 percent of patients who received only Focetria.

SciClone Pharmaceuticals Inc. said it will report more data from the study in about six months.

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