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.
Derby M, Alexander-Miller M, Tse R, Berzofsky J.Derby M, et al.J Immunol. 2001 Feb 1;166(3):1690-7. doi: 10.4049/jimmunol.166.3.1690.J Immunol. 2001.PMID: 11160212
Parks GD, Alexander-Miller MA.Parks GD, et al.J Gen Virol. 2002 May;83(Pt 5):1167-1172. doi: 10.1099/0022-1317-83-5-1167.J Gen Virol. 2002.PMID: 11961272