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.
Garcia-Robles I, Akarsu H, Müller CW, Ruigrok RW, Baudin F.Garcia-Robles I, et al. Among authors: muller cw.Virology. 2005 Feb 5;332(1):329-36. doi: 10.1016/j.virol.2004.09.036.Virology. 2005.PMID: 15661164Free article.