Dr Caleb Dawson (IMAGE) Walter and Eliza Hall Institute Caption Dr Caleb Dawson from the Walter and Eliza Hall Institute was part of an Australian research team that discovered a new type of immune cell in breast ducts. Credit Walter and Eliza Hall Institute Usage Restrictions With credit to Walter and Eliza Hall Institute 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.