CNN Health

Late one night on Facebook, a girl with cystic fibrosis messaged a boy with cystic fibrosis, and both their lives were changed forever.

Angelina Jolie's decision to remove her breasts and ovaries to prevent cancer (as she detailed in today's New York Times op-ed) might sound extreme, but breast cancer experts say she was spot on.

The public health benefits of barring people under age 21 from buying cigarettes could be tremendous, including "4.2 million fewer years of life lost" among the next generation of American adults, according to a report released in March by the Institute of Medicine.

"Hey dude -- can you turn your music down?"

As globalization continues to grow and dominate our trade, economy and lifestyles, the associated ease of access to remote regions of the world is reflected in our travels.

I am 17 years old and a senior in high school. I am also, like thousands of other people living on this planet, sick.

A respiratory virus called Enterovirus D68 has sent hundreds of children to the hospital. CNN's Elizabeth Cohen explains.

Four years ago Tom and Kari Whitehead knew nothing about the battle raging within their daughter's body.

"About 20" cases of a polio-like syndrome have been identified in California children over the past 18 months, a Stanford University researcher says.

When Galaxy Airlines Flight 203 with 71 passengers and crew crashed shortly after takeoff from Reno, Nevada, in 1985, there was only one survivor: George Lamson Jr.

Things aren't looking good for people with allergies in Tennessee. Not only is the pollen apocalypse on its way, three of the state's major cities made the Asthma and Allergy Foundation's annual list of the 10 worst places for spring allergy sufferers.

When Cesar Castillo's cancer returned for the second time, he fell apart.

I grew up in a place where the sun shone every day from May through October. These sun-drenched days were the happiest times of my life.

Parents worry a lot about fever, especially the ones that come from illness.

Helen Olive had her first allergy attack 11 years ago. She had gone to bed only to wake up hours later because her neck felt as if it were on fire.

One of the first things Thomas Lobel told his parents was that they were wrong.