Some parents have raised concerns that vaccinating young girls against HPV, a sexually transmitted illness, might lead to more unsafe sexual activity in these girls. New evidence, however, suggests that's not the case — and the vaccine could prevent serious health problems.

In the quest to find the cause of ADHD, anything a child is exposed to can be on the list of suspects. New evidence may mark one potential cause off that list.

In the past, patients with Lyme disease — a disease spread through the bites of ticks — had a single doctor visit and were prescribed antibiotics. That course of treatment, however, may not be enough for all patients. And more treatment could increase health care costs.

The beliefs many Americans hold about their cancer risk might be doing them a disservice.

Young adults may be less likely than older people to worry about their health, but this can spell trouble down the road — especially when a chronic condition is involved.

Money — or at least the love of it — may be the root of all evil, as the old saying goes. And it may also be the root of a lot of stress among Americans.

Despite health officials' efforts to raise public awareness about the potential health benefits of vaccines, many adults aren't going in to get their shots.

More people have been surviving cancer. And as more patients win the fight, one type of cancer has taken the lead in threatening the most women.

Weight loss surgery can help obese people lose weight and keep it off — and new evidence suggests it might also lengthen their lives.

Smoking is a potential health issue for more than just those lighting up. Secondhand smoke can also cause health problems for nonsmokers.