Once the first doses of pandemic influenza a (H1N1) vaccine become available, national health authorities will decide how to implement national vaccination campaigns.

一旦第一剂大流行甲型流感(H1N1)疫苗到位，国家卫生机构就要决定怎样去实施国家疫苗接种活动。

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Newborns need a vaccination within the first day of life to prevent transmission of the virus from their mothers, and babies need two more doses within the first six months for full immunity.

VOA: standard.2010.07.26

If officials decide to produce a vaccine, the first doses would be ready early in the fall.

CNN: Swine flu 'not stoppable,' World Health Organization says

Supplies of flu vaccine have also been ordered and the first doses could be administered in the autumn.

BBC: Tamiflu

However, it would likely take months to produce the first doses.

NPR: Bird Flu 101: How Bad Is The New H7N9 Strain?