Officials see no link between miscarriage risk and flu shots

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Health officials sound the alarm over flu threat

CDC: 41 flu-related deaths among children; insight from Dr. Nicole Saphier.

Health officials say further research has not found a miscarriage risk for women who get annual flu shots.

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Two years ago, a puzzling study found women who had miscarriages between 2010 and 2012 were more likely to have had back-to-back annual flu shots. So experts urged more research.

This week, Centers for Disease Control and Prevention officials said a larger and more rigorous study found no link over three subsequent flu seasons.

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Meanwhile, the CDC raised a question about a new shingles vaccine. A preliminary study found two cases of a rare paralyzing condition among more than 100,000 people who got a Shingrix shot. But one of the two may have started developing symptoms before the shot. Officials say they're doing more research.