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Published online 1 June 2007 | Nature | doi:10.1038/news070528-12

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Babies respond to mum's flu jab

Fetal immune system not so naive after all.

When a pregnant mother receives her recommended flu vaccine, she's not the only one whose immune system gears up to battle the virus. Her fetus can also mount an immune response against the flu, say researchers in the United States.

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