An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
van Dorp C, Goldberg E, Ke R, Hengartner N, Romero-Severson E.van Dorp C, et al.Virus Evol. 2022 Oct 7;8(2):veac089. doi: 10.1093/ve/veac089. eCollection 2022.Virus Evol. 2022.PMID: 36325031Free PMC article.