Bird (IMAGE) University of Veterinary Medicine -- Vienna Caption Usutu-viruses not just infect birds, but also humans in a higher number than previously thought. Credit Georg Mair/Vetmeduni Vienna 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.