Phage Collection (IMAGE) Howard Hughes Medical Institute Caption At the University of Pittsburgh, an archive of 15,000 individual phage samples are stored in freezers. Credit Graham Hatfull Lab Usage Restrictions Must use credit. 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.