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.
Yount B, Roberts RS, Lindesmith L, Baric RS.Yount B, et al. Among authors: baric rs.Proc Natl Acad Sci U S A. 2006 Aug 15;103(33):12546-51. doi: 10.1073/pnas.0605438103. Epub 2006 Aug 4.Proc Natl Acad Sci U S A. 2006.PMID: 16891412Free PMC article.