Hospital infections: Tracking killer that lies in wait

Since Carole Moss's son died from a drug-resistant staph infection in 2006, she has lobbied tirelessly to change the laws governing the reporting of methicillin-resistant Staphylococcus aureus. Moss believes her son caught the bacterium after undergoing a series of hospital tests for a condition he was born with. Her concern is growing among lawmakers, insurance companies and hospital administrators as they tackle the deadly and expensive problem of hospital-acquired infections.