Copyright © 2017 American Academy of Pediatrics. From: Human Herpesvirus 6 (Including Roseola) and 7 Red Book® 2015, 2015 Figure Legend: Thin-section electron micrograph image of human herpesvirus 7, which causes roseola. Virions consist of a darkly staining core within the capsid that is surrounded by a proteinaceous tegument layer and enclosed within the viral envelope. Courtesy of Centers for Disease Control and Prevention Date of download: 10/8/2017 Copyright © 2017 American Academy of Pediatrics. All rights reserved.