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. Anthony was the youngest. Kevin was the 2nd youngest. Jason was the 3rd youngest. Matthew was the 4th youngest. Gary was the 5th youngest. Timothy was the 6th youngest. The last one was Jose, who was the oldest. They all looked fantastic that day. 
Question: Who has a greater chance of developing a chronic infection: Matthew or Kevin?
Kevin.