Goats with herder in Ethiopia (IMAGE) Penn State Caption Pinpointing key risk factors of transmission of PPRV, a virus that produces a highly infectious and often fatal disease in sheep and goats, could improve vaccination campaigns to control the virus. A new study by an international team including Penn State researchers found that an animal's age does not affect PPRV transmission risk, but how those animals are managed plays an important role. Credit Rod Waddington/Flickr Usage Restrictions Credit must be provided alongside image. CC BY-SA 2.0 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.