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Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Flu symptoms can be more severe when you're pregnant, landing women in the hospital, threatening their lives and even leading to preterm birth or miscarriage. The virus is a risk to the woman and the baby.

So, it's particularly important that people who are pregnant get the flu vaccine. And it's also important that the effects of those vaccines be studied in pregnant women.

An estimated 4 percent of Americans have food allergies, and the Centers for Disease Control and Prevention has concluded that allergies are a growing public health concern. But diagnosing allergies can be tricky, and kids can outgrow them, too.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

It seemed like the controversy involving NFL players kneeling during the national anthem had died down a bit — that is until President Trump stirred up a hornet's nest Friday night during a campaign trip to Alabama.

Trump unleashed a tirade of strong comments against NFL players who don't stand during the playing of "The Star Spangled Banner."

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