Scientists say they have discovered that antidepressants get to work immediately to lift mood, contrary to current belief.

US scientists say they have discovered an antibody that could minimise the damage caused by major traumas.

It is a myth that women have different heart attack symptoms from men, according to Canadian researchers.

Gene therapy can be particularly effective in treating inherited sight problems in children, fresh trials show.

President Obama declares H1N1 swine flu a national emergency, in a move to help medical teams handle the outbreak.