Emerging Infectious Diseases is an open-access, peer-reviewed journal published monthly by the Centers for Disease Control and Prevention (CDC). Note that beginning with Volume 26, the journal began publishing online-only. Publication in EID enables compliance with the NIH Public Access Policy. Emerging Infectious Diseases follows the International Committee of Medical Journal Editors recommendations for the conduct, reporting, editing, and publishing of scholarly work in medical journals. The journal’s peer review process allows for critical assessment of submitted manuscripts by experts who are usually not part of its editorial staff. As an independent publication, the journal’s peer-review process operates independently from CDC’s clearance processes. The conclusions, findings, and opinions expressed by authors contributing to Emerging Infectious Diseases do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by the Public Health Service or by the U.S. Department of Health and Human Services.