"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: The immune system function declines with age, but a ...

Add Yahoo as a preferred source to see more of our stories on Google. Those who are at high risk of getting sick should avoid crowded settings during the holidays and ask their visitors to take extra ...

Citrus fruits are rich in vitamins and antioxidants to fight infection and prevent chronic illness. Citrus fruits include foods such as oranges, tangerines, grapefruits, limes, and lemons. In addition ...

Though there are several immunity-boosting foods, a diet rich in citrus fruits has proved it can support your immune system and fight infection. Known for their vitamin C content, citrus fruits like ...

As cold and flu season begins, you may be wondering what you can do to help keep your immune system strong with all the nasty bugs going around. In addition to staying up to date on your seasonal ...

Vitamins and supplements like zinc and cod liver oil are often touted for their ability to boost your immune system, but Jeffrey Bland, the "father of functional medicine," says that's not actually ...

For many, having a Christmas tree (typically a pine or fir tree) in the living room is a beloved holiday tradition, and the tradition may serve not only a spiritual role but also a health benefit. A ...

St. Jude Children's Research Hospital scientists have discovered how tumors disable immune "gatekeeper" cells that alert the ...