H5N1 Virus (IMAGE) University of California - Los Angeles Caption The study explains why children and young adults are more likely to be infected with H5N1, shown here, while H7N9 disproportionately affects older adults. Credit Cynthia Goldsmith 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.