Even when no illnesses have been reported, sometimes concerns about food safety can cause a stir. That was the case this week, as several companies announced food contamination worries. Luckily, no reports of consumers becoming ill have developed.

Not long ago, scientists declared that diesel fumes were cancer-causing and linked to lung cancer. An international body has now gone a step further in classifying outdoor air pollution.

As more parents and schools become aware of the dangers of concussions in high school football, they seek ways to reduce the risk. But special helmets or mouth guards may not help.

For most people, colonoscopy screening for colorectal cancer should begin at age 50. If everything looks good, the next colonoscopy happens 10 years later. For folks with a family history of the disease, earlier and more frequent screenings are recommended. But even that may not be enough.

People at risk for certain infectious diseases are usually disqualified from being blood donors. However, new research suggests that they may still be safe organ donors.

This summer, several outbreaks of illness caused by the parasite  Cyclospora swept across the US. Many of those illnesses occurred in Texas, and the infection source was unknown.

The Internet is an increasingly popular source for health and wellness information. And while being online offers a rich and ongoing supply of information, researchers wanted to know if the Internet helped change behaviors.

While detecting cancer early is essential to beating the disease, some screenings can overdiagnose — that is, they might pick up cancers that won’t ever be a problem, which can lead to unnecessary treatment.

In the US, someone has a stroke every 40 seconds. To lower that rate, the American Stroke Association is urging people to learn the stroke warning signs for World Stroke Day on October 29.

In the age of the internet, people can order pretty much anything online. For mothers who cannot nurse their babies, even breast milk is available — but it may not be safe.