Background Paragraph: Hepatitis B is a contagious virus that affects the liver, infection can last from a few weeks to a serious lifelong illness. Two different types of infection exist for this disease, "acute" and "chronic." Acute Hepatitis B is a short term illness that occurs within 6 months of exposure, Chronic Hepatitis B is long term and happens when the virus remains in the body. The younger the child is, the greater their chance of developing a chronic infection and this risk goes down as the child gets older. Approximately 90% of infected infants will develop a chronic infection.[3]. 
Story: A 4th grade classroom photo was held today. They all gathered by age. Helen was the oldest. Sandra was the 2nd oldest. Donna was the 3rd oldest. Carol was the 4th oldest. Ruth was the 5th oldest. Sharon was the 6th oldest. The last one was Michelle, who was the youngest. They all looked terrific that day. 
Question: Who has a greater chance of developing a chronic infection: Donna or Sharon?
Sharon.