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.
Manchego A, Spencer E.Manchego A, et al. Among authors: spencer e.Arch Virol. 2003 Jun;148(6):1071-84. doi: 10.1007/s00705-003-0004-1.Arch Virol. 2003.PMID: 12756615
Ríos M, Muñoz M, Torrence PF, Spencer E.Ríos M, et al. Among authors: spencer e.Antiviral Res. 1995 Mar;26(2):133-43. doi: 10.1016/0166-3542(94)00070-o.Antiviral Res. 1995.PMID: 7605112
Rivas-Aravena A, Vallejos-Vidal E, Cortez-San Martin M, Reyes-Lopez F, Tello M, Mora P, Sandino AM, Spencer E.Rivas-Aravena A, et al. Among authors: spencer e.J Virol. 2011 Aug;85(16):8037-45. doi: 10.1128/JVI.00533-11. Epub 2011 Jun 8.J Virol. 2011.PMID: 21653663Free PMC article.