Cardiac cells are extremely vulnerable to blood-borne pathogens that can cause heart damage. In here, a culture of cardiac fibroblasts has been used to study the interaction between cardiac cells and a virus. The cytoskeleton (magenta), mitochondria (red), and nuclei (blue) of cardiac fibroblasts can be appreciated. The cell in the center has been infected with a virus that forms inclusion bodies (green), a site of viral replication. Field width: 0.1 mm. Image by Efrain Rivera Serrano. Research group: Dr. Barbara Sherry, Molecular Biomedical Sciences.