A new type of gene therapy may stop the progression of the most common form of inherited emphysema.

  The longer heart patients attend cardiac rehabilitation programs, the lower their risk for death and heart attacks, a new study finds.

  A fatty substance found naturally in the lungs may provide a natural defense against respiratory syncytial virus (RSV) infection.

  Smoking and weight are tied to sun damage and aging of skin on the face, a new study shows.

  Australian researchers report that one H1N1 swine flu shot may be enough for kids -- but the CDC warns that most kids will need two vaccine doses for protection.

  The teen birth rate rose for the second year in a row in 2007, reversing a 14-year decline, new CDC figures confirm.

  New research suggests that many of the same genetic factors that lead people to drink alcohol also lead them to smoke marijuana.

  Autism spectrum disorders increased by 57% in just four years, the CDC today reported. One in 110 U.S. kids suffers a form of autism.

  A new study shows that Southern states are the happiest while coastal rivals New York and California are at the bottom of the list.

  Nearsightedness has been increasing dramatically in the U.S. in recent years, but the reasons are blurry, new research indicates.

  Biology may be the reason why women are more prone than men to developing wrinkles around the lips -- and deeper ones, too.

  The first genetic maps of lung cancer and melanoma reveal the pivotal role of smoking and sunlight in triggering these two deadly forms of cancer.

  An expert explains how Actovegin works, including its potential role as a performance-enhancing drug for athletes.

  Researchers report that the breast cancer drug Herceptin should be given at the same time as chemotherapy, not after chemotherapy is concluded.