Humans first journeyed into space in 1961, but even half a century later, questions remain about how spaceflight affects the human body.
When it comes down to it, it's your immune system versus the world. From "innate" immunity — which protects your body against basic threats — to "adaptive" immunity, which homes in on specific targets, your immune system has you covered. Sometimes, however, your immune system can turn against you, leading to autoimmune diseases. To keep up with all things immune, check here for the latest news.
The German government is considering approval of a food ingredient that most people try their best to avoid: parasite eggs.
Nobody likes diarrhea. But is the icky and uncomfortable experience actually the body's way flushing bad stuff out of your system?
The case of a young girl who frequently got sick from colds has helped scientists pinpoint a rare genetic mutation that makes people more susceptible to cold viruses.
You may not love your belly fat, but the large sheet of fat that stretches across your abdomen serves a purpose.
The famous Spanish painter Francisco Goya suffered a mysterious illness and lost his hearing in 1793, and now experts may have figured out why.
The people of Sardinia are famous for their longevity, but also have some of the world's highest rates of multiple sclerosis and lupus.
A usually harmless virus may play a role in triggering celiac disease, a new study in mice suggests.
For some people, the arrival of spring brings symptoms of seasonal allergies — sneezing, wheezing, watery eyes and a running nose — which can make this a miserable time of year.
Armed with new insights into the interactions between cancer and the immune system, research teams are developing novel treatments to harness the full potential of the body's natural defenses.
Type 1 diabetes may be triggered by distress signals sent out with cells from the pancreas, new research suggests.
A young woman's weeklong bout of "strange behavior" was caused by a rare disease in which the immune system attacks the brain, according to a new report of the woman's case.