Cover photograph (Copyright © 2003, American Society for Microbiology. All Rights Reserved.): Mitochondrial organization within fibroblasts infected with human cytomegalovirus. Mitochondria were visualized with antibody to mtHSP70 (green), and infected nuclei were visualized with antibody to viral nuclear antigen (orange). The reticular form of mitochondria found within uninfected fibroblasts is altered to a punctate form by the viral inhibitor of apoptosis vMIA/pUL37x1. (See related article in January 2003: vol. 77, no. 1, p. 631.)