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.
Alfano-Sobsey E, Sweat D, Hall A, Breedlove F, Rodriguez R, Greene S, Pierce A, Sobsey M, Davies M, Ledford SL.Alfano-Sobsey E, et al.Epidemiol Infect. 2012 Feb;140(2):276-82. doi: 10.1017/S0950268811000665. Epub 2011 Apr 28.Epidemiol Infect. 2012.PMID: 21524343