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Immune response may explain worse flu symptoms among pregnant women
Immune response may explain worse flu symptoms among pregnant women

Women who get the flu while pregnant have a much higher risk of hospitalization and death and are four times more likely to deliver a premature baby. During the 1918 epidemic, in fact, the death rate among pregnant women was at least 28 times that of the general population. Medical science has assumed this vulnerability was an unfortunate result of a suppressed immunity that keeps a woman's body from rejecting the fetus.  A Stanford study now disputes that central assumption, and suggests the immune system kicks into high gear in response to the pandemic "swine flu" virus, H1N1, and a seasonal H3N2 influenza virus. The results, published online Monday in the journal...

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