Transmission of Influenza A virus (IMAGE) Duke-NUS Medical School Caption Influenza A boasts a wide range of natural hosts, with different strains established in different species. This wide network gives it an extra evolutionary advantage, turning it into a perennial threat to human and animal health Credit Credit: Adapted by Yvonne Su from Figure 2, originally published by her and her team in: Joseph U, et al in “The ecology and adaptive evolution of influenza A interspecies transmission” Influenza and Other Respiratory Viruses 2017; 11: 74–84. DOI: 10.1111/irv.12412 Usage Restrictions Credit: Adapted by Yvonne Su License Original 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.