Many Americans shun the seasonal flu vaccine, according to federal health data. Here is why doctors say that is a bad idea.Four months pregnant with her youngest child, Michelle Heil got a flu shot. She never had one before, but her doctor strongly recommended it, so she followed his advice.Within a week, she was in hospitalized for two days. Doctors diagnosed her with the flu.A coincidence? Maybe, she said. But the Bensalem, Pennsylvania, woman says she isn't taking any chances. [...]
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