Exaggerated IRF4 Expression (IMAGE) PLOS Caption This image shows exaggerated IRF4 expression associated with Th2 immunity in tuberculin skin tests of HIV infected TB-IRIS patients. Credit Lucy Bell, University College London Usage Restrictions CC-BY 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.