The most common form of arthritis can cause major disability in patients who are 50 or older in the United States. A new study showed just how common it was among those living in urban areas.

The link between obstructive sleep apnea and high blood pressure has been known among doctors for a while. But it may be a stronger link than most realize.

Many people want to slim down to cut their risks for heart disease and diabetes, but a new study suggests that being overweight may also affect cancer risk.

Facing more than 570,000 chikungunya cases in the Americas and 484 in the US as of early August, officials have been scrambling to slow the spread of the virus. One vaccine may have the potential to help.

Prescription medicine misuse continues to be a problem in the United States, and researchers recently wanted to find out why.

Medical conditions that affect breathing can take an immediate toll on health and may set the stage for other serious problems later in life.

Despite warnings about what it may be doing to their health, new research suggests many Americans are still opting for sugar-sweetened beverages every day.

For the first time in the United States, doctors have replaced a failing heart valve just outside the heart, rather than inside it.

Many worry about the diseases vaccines protect against, but a recent study showed that efforts to improve immunizations and treatments for at least one illness may be working.

The US Food and Drug Administration (FDA) has issued a statement warning against fraudulent Ebola treatments.