Healthcare Youth in polluted cities at increased risk of Alzheimer's Updated : April 14, 2018 12:22 PM IST The researchers studied 203 autopsies of Mexico City residents in the US ranging in age from 11 months to 40 years. The finding indicate that Alzheimer's starts in early childhood, and the disease progression relates to age, pollution exposure and status of Apolipoprotein E (APOE 4). Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.