Richard Knox

Hey guys, feeling confused about the fuss over PSA screening for prostate cancer?

Listen up. A couple of docs who ponder such medical dilemmas say there's a middle ground between business-as-usual and throwing PSA tests out altogether.

A year after cholera burst upon earthquake-weary Haiti, plans are afoot to begin vaccinating people against the highly contagious disease.

Nearly half a million Haitians — about 5 percent of the population — have already been afflicted and more than 6,500 have died.

But the goal of the vaccinators isn't to stop cholera in its tracks. They can't do that in Haiti with just 200,000 doses — enough for only 100,000 people — that's all the manufacturer can offer.

After decades of disappointment, researchers think they're finally on track to unleash the first practical vaccine against malaria, one of mankind's ancient scourges.

In the world's first large field trial of an experimental malaria vaccine, several thousand young children who got three doses had about 55 percent less risk of getting the disease over a year than those who got a control vaccine against rabies or meningitis.

There's been an explosion in the number of Americans who take vitamins and other dietary supplements. But do they do any good? And might they actually be doing harm? Two new studies raise serious questions.

Vitamins seem like such a good thing that drugstores have whole aisles devoted to them, including products that promise a healthy prostate.