Nearly all conventional flu vaccines are made by growing the virus in chicken eggs, a slow process that is even slower with some strains - including 2009 H1N1 flu.

几乎所有的传统流感疫苗都是通过在鸡胚中增殖病毒而获得德，这是一个缓慢的过程，某些毒株甚至更慢——包括2009年的H1N 1流感病毒。

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Squalene is being added to improve the efficacy of several experimental vaccines including pandemic flu and malaria vaccines which are being developed.

几种正处于开发阶段的实验性疫苗(包括大流行性流感疫苗和疟疾疫苗)也添加了角鲨烯，用于增强疫苗效力。

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Of course, most flu strains, including (so far) the 2009 pandemic virus, cause only mild symptoms in the vast majority of people.

当然，多数流感病毒毒株，包括迄今为止的2009年的大流行病毒(甲型h1n 1流感病毒，译者注)，在大多数人中只引起轻微的症状。

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The hope is to develop a vaccine that could give lifelong protection against a majority of flu viruses, including bird flu.

VOA: special.2009.03.04

In the meantime, the Obama administration is urging common-sense steps to prevent the spread of swine flu, including frequent hand-washing and asking flu sufferers to stay at home.

VOA: standard.2009.05.03

She did not have an infection during her pregnancy, as her doctors had prepared for, but she faced minor complications including the flu, some bleeding and physical discomfort from her growing baby.

NPR: 5-Organ Transplant Patient Gives Birth: Baby Girl

Vaccines were also dogged by safety issues, including the swine flu vaccine fiasco of 1976, and by the dubious theory of a link between autism and the mercury once used in a vaccine preservative.

FORBES: Magazine Article

Past experiments have shown it to make viruses -- including the H5N1 bird flu virus -- more likely to infect ferrets, which are commonly used in flu research.

CNN: New bird flu well-adapted to infect people