Hospital infections kill more Americans each year than AIDS, car accidents and breast cancer combined -- and researchers are searching for solutions. This week, a study of 153 Veterans Affairs hospitals shows that doing a simple swab test to identify and isolate the few patients carrying infection-causing bacteria can save lives. It's called screening, but even more important is cleaning. Studies are rolling in that hospitals need to be cleaner. In fact, if you're visiting a friend or relative in the hospital, don't bring flowers or candy -- take gloves and a canister of bleach wipes. Hospitals do an inadequate...