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.
Ori A, Shaul Y.Ori A, et al. Among authors: shaul y.Virology. 1995 Feb 20;207(1):98-106. doi: 10.1006/viro.1995.1055.Virology. 1995.PMID: 7871756Free article.