Many of us get confused by claims of how much the risk of a heart attack, for example, might be reduced by taking medicine for it. And doctors can get confused, too.
Just ask Karen Sepucha. She runs the Health Decisions Sciences Center at Boston's Massachusetts General Hospital. A few years ago she surveyed primary care physicians, and asked how confident they were in their ability to talk about numbers and probabilities with patients.
Bill Simon, head of Wal-Mart's U.S. division, is leaving the retail giant, the company said Thursday.
Any major shake-up at Wal-Mart is closely watched because the company is so important — it tops the Fortune 500 list with annual sales approaching a half-trillion dollars. So lots of people are speculating about what Simon's departure really means. Here are some theories:
The U.S. says it has "new evidence" that Russian forces have been firing artillery across the border to attack Ukrainian military positions, and that Moscow is planning to ship powerful rocket artillery to the rebels it backs in the country's east.
"We have new evidence that the Russians intend to deliver heavier and more powerful multiple rocket launchers to the separatist forces in Ukraine, and have evidence that Russia is firing artillery from within Russia to attack Ukrainian military positions," State Department spokeswoman Marie Harf said during a daily briefing.
The fight against Ebola in West Africa suffered a setback Wednesday. Dr. Sheik Umar Khan, one of the top doctors treating patients, caught the virus, even though he was wearing protective gear.
"Even with the full protective clothing you put on," Khan has said, "you are at risk."
That statement made us wonder about those yellow and white suits you see in photos: Just how good are they at protecting health workers from the bodily fluids that can transmit the virus — vomit, blood, sweat, mucus?
The presidents of Honduras, Guatemala and El Salvador will meet with President Obama on Friday.
But before the meeting, the heads of state are making the rounds in Washington, telling their side of an immigration crisis that has driven tens of thousands of unaccompanied children to the U.S. border.