The most common new technique is to grow the vaccine in mammalian cells cultured in the lab; Novartis won European approval for its cell-based vaccine earlier this year.

现在最普遍的方法是从实验室中的哺乳动物细胞培养中获得疫苗，诺华就借此新技术在今年年初获得了欧洲监管者的批准。

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New cell-based technologies are in the pipeline, however, and may finally get the support they need now that the United States is faced with a critical shortage of flu vaccine.

但是，新的细胞生产技术已经投入使用，并且由于美国现在面临的流感疫苗的严重短缺而可能最终得到它们所需要的支持。

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For hepatitis C vaccine we're learning a lot from in vitro or cell-based methods."

VOA: standard.2010.02.16