Others issue dire warnings about squalene, an immune booster used in military vaccines and in some European flu vaccines but not in any American ones.

还有一些出版物发布关于鲨烯的可怕警告，这是在军事疫苗和某些欧洲流感疫苗中的一种免疫增强剂，而任何美国流感疫苗中却不存在。

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Children between the ages of 6-35 months can be inoculated with A/H1N1 flu vaccines free of charge on a volunteer basis, the Ministry of Health said Thursday.

卫生部7日下发通知，建议将6-35月龄儿童列入我国甲型H1N1流感疫苗接种人群，并遵循自愿、免费的原则。

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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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Viruses change,or mutate, so flu vaccines must be reformulated each year to target the most common threats.

VOA: special.2009.03.04

Flu vaccines are not difficult to produce, but the drug companies found this virus difficult to grow.

VOA: standard.2010.04.29

But the current swine flu is a new strain to which humans have no immunity and against which existing vaccines offer no protection.

VOA: standard.2009.04.30

For adults, the focus is on tetanus, and flu vaccines, when they become available.

CNN: Officials: Chemicals bigger concern than cholera

Flu vaccines will get sold every year, without investments in newer and better ones.

FORBES: The Flu Season Is A Shot In The Arm For Vaccine Makers?

For them, only injections of H1N1 and seasonal flu vaccines are appropriate, since they contain inactivated or dead virus.

CNN: Study: Underlying conditions playing less of role in H1N1