AP - Nearly 1 in 20 Americans older than 50 have artificial knees, or more than 4 million people, according to the first national estimate showing how common these replacement joints have become in an aging population. […]

AP - Efforts by India and the European Union to strengthen trade are threatening India's ability to deliver lifesaving medicines to the world's poorest, analysts say as the two sides push through protracted negotiations on a free-trade pact. […]

HealthDay - THURSDAY, Feb. 9 (HealthDay News) -- Four new genes associated with type 2 diabetes have been identified by researchers, who also pinpointed six independent diabetes-associated gene variants at previously known locations on chromosomes. […]

HealthDay - THURSDAY, Feb. 9 (HealthDay News) -- The cancer drug bexarotene quickly eliminates Alzheimer's disease-associated amyloid beta from the brain and reverses memory problems in mice, a new study finds. […]

HealthDay - THURSDAY, Feb. 9 (HealthDay News) -- Heart disease may be a risk factor for prostate cancer, a new study suggests. […]

HealthDay - THURSDAY, Feb. 9 (HealthDay News) -- Small, premature infants born by cesarean section are at 30 percent higher risk for serious breathing problems than those delivered vaginally, a new study finds. […]

HealthDay - THURSDAY, Feb. 9 (HealthDay News) -- A new study finds that the babies of women who had chemotherapy while pregnant aren't at higher risk for a variety of medical disorders, a sign that the treatment should be safe for the fetus in most instances. […]

AP - Researchers have encouraging news for women who find themselves in a very frightening situation: having cancer while pregnant. Studies suggest that these women can be treated almost the same as other cancer patients are, with minimal risk to the fetus. […]

Reuters - Obese Americans in the military are a national security hazard and U.S. first lady Michelle Obama wants to see that change. […]

Reuters - People enrolled in early stage trials for possible cancer treatments may underestimate the risks involved and overestimate the potential benefits, suggests a new study. […]

Reuters - In a new study, states with more comprehensive sex education programs had lower teen birth rates -- but the effect seemed to be due more to political, religious and social differences between those states than the sex ed itself. […]

LiveScience.com - A cancer drug has succeeded in reversing Alzheimer's disease in its early stages in mice, according to a new study. […]

AP - More and more U.S. adults are being told by their doctor to get out and exercise, according to government survey released Thursday. […]

HealthDay - WEDNESDAY, Feb. 8 (HealthDay News) -- Fasting, especially when combined with chemotherapy, appears to slow the growth of cancerous tumors in mice, new research suggests. […]

HealthDay - WEDNESDAY, Feb. 8 (HealthDay News) -- Children with depression are at increased risk for bullying, the results of a new study suggest. […]

ContributorNetwork - A study published by the American Journal of Respiratory and Critical Care Medicine reverses some earlier thinking that breastfeeding by mothers with asthma might increase the child's risk for the disease. The study found breastfeeding strengthens children's lungs, even if the mother has asthma. Here are details about breastfee […]

AP - Roy Hallums was enduring his 311th day of captivity, blindfolded, his hands and feet bound, stuffed into a hole under the floor of a farm building outside Baghdad. He heard a commotion upstairs and managed to get the blindfold off. Delta Force troops broke open the hatch. An American soldier jumped down. […]