Patient William Wishart, age 4 months, looks on as Dr. Melanie Walker uses a portable computer to enter information from his exam into an electronic medical records system, in North Raleigh, N.C., in November. Chris Seward/MCT /Landov hide caption

itoggle caption Chris Seward/MCT /Landov

Transporting reams of athletes' medical information has become a major burden for the U.S. Olympic Committee, and is one reason it's switching to electronic medical records. Andrew Villegas/KHN/iStockphoto.com hide caption

itoggle caption Andrew Villegas/KHN/iStockphoto.com