Severity outcomes associated with SARS-CoV-2 XBB variants, an observational analysis.

"Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper."

"This study was only possible because the unique efforts of the Johns Hopkins Clinical Microbiology Laboratory faculty and staff. HHM is supported by the HIV Prevention Trials Network, sponsored by the National Institute of Allergy and Infectious Diseases, National Institute on Drug Abuse, National Institute of Mental Health, and Office of AIDS Research of the NIH, US Department of Health and Human Services (UM1 AI068613), the NIH RADx-Tech program (3U54HL143541–02S2), Johns Hopkins Department of Pathology, and the Johns Hopkins Center of Excellence in Influenza Research and Surveillance (HHSN272201400007C). Funding was provided by the CDC (75D30121C11061) and the Maryland Department of Health. EYK is supported by the CDC MInD-Healthcare Program (U01CK000589). The views expressed in this manuscript are those of the authors and do not necessarily represent the views of the National Institute of Biomedical Imaging and Bioengineering; the National Heart, Lung, and Blood Institute; the NIH, or the US Department of Health and Human Services."