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.
Malley R, Trzcinski K, Srivastava A, Thompson CM, Anderson PW, Lipsitch M.Malley R, et al.Proc Natl Acad Sci U S A. 2005 Mar 29;102(13):4848-53. doi: 10.1073/pnas.0501254102. Epub 2005 Mar 21.Proc Natl Acad Sci U S A. 2005.PMID: 15781870Free PMC article.
Malley R, Srivastava A, Lipsitch M, Thompson CM, Watkins C, Tzianabos A, Anderson PW.Malley R, et al.Infect Immun. 2006 Apr;74(4):2187-95. doi: 10.1128/IAI.74.4.2187-2195.2006.Infect Immun. 2006.PMID: 16552049Free PMC article.