JAIDS Graphs (IMAGE) University of North Carolina Health Care Caption LEFT: A depiction of the contact patterns by age group in the Thai Nguyen cohort of people who inject drugs. RIGHT: The corresponding estimates of the numbers of new HIV infections expected to be acquired (solid line) or transmitted by (dotted line) each age group, based on observed mixing and HIV prevalence patterns. Credit Kumi Smith Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.