immune system immune system

In addition to profound exhaustion that isn't relieved with sleep, the illness now called ME/CFS includes flu-like symptoms, muscle pain, "brain fog" and various other physical symptoms, all of which typically worsen with even minor exertion. Malte Mueller/Getty Images hide caption

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Malte Mueller/Getty Images

Jack Gilbert, co-author of the book "Dirt Is Good," says kids should be encouraged to get dirty, play with animals and eat colorful vegetables. Elizabethsalleebauer/Getty Images/RooM RF hide caption

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Elizabethsalleebauer/Getty Images/RooM RF

'Dirt Is Good': Why Kids Need Exposure To Germs

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For people with celiac disease gluten-free food is a must. A new study suggests that a common virus may trigger the onset of the disease. Daniel Acker/Bloomberg/Getty Images hide caption

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Daniel Acker/Bloomberg/Getty Images

The start of flu season is still weeks or months away, but you can get a flu shot now at many pharmacies. "It's a way to get people into the store to buy other things," says Tom Charland, an analyst who tracks the walk-in clinic industry. Darron Cummings/AP hide caption

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Darron Cummings/AP

Jim Allison in his lab at the University of Texas MD Anderson Cancer Center in Houston. Scott Dalton for NPR hide caption

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Scott Dalton for NPR

A Scientist's Dream Fulfilled: Harnessing The Immune System To Fight Cancer

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When a baby is born by cesarean section, she misses out on Mom's microbes in the birth canal. Sarah Small/Getty Images hide caption

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Sarah Small/Getty Images

Researchers Test Microbe Wipe To Promote Babies' Health After C-Sections

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Neanderthals, represented here by a museum's reconstruction, had been living in Eurasia for 200,000 years when Homo sapiens first passed through, and the communities intermingled. The same genes that today play a role in allergies very likely fostered a quick response to local bacteria, viruses and other pathogens, scientists say. Pierre Andrieu/AFP/Getty Images hide caption

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Pierre Andrieu/AFP/Getty Images

Itchy Eyes? Sneezing? Maybe Blame That Allergy On Neanderthals

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Joseph Daniel Fiedler for NPR

Fetal Cells May Protect Mom From Disease Long After The Baby's Born

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Psyched that it's finally spring? Shifts in the season may affect more than your mood. Corbis hide caption

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Corbis

Seasons May Tweak Genes That Trigger Some Chronic Diseases

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Vidhya Nagarajan for NPR

Kids, Allergies And A Possible Downside To Squeaky Clean Dishes

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