New Tuberculosis Vaccine (image) Helmholtz Centre for Infection Research Caption The picture shows attenuated tuberculosis bacteria, enclosed by macrophages, the scavenger cells of the immune system. Credit MPI for Infection Biology - CF Microscopy / Volker Brinkmann Usage Restrictions You may use this picture if attributed as indicated. 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.