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.
Narayan O, Clements JE.Narayan O, et al. Among authors: clements je.J Gen Virol. 1989 Jul;70 ( Pt 7):1617-39. doi: 10.1099/0022-1317-70-7-1617.J Gen Virol. 1989.PMID: 2544657Review.No abstract available.
Crane SE, Clements JE, Narayan O.Crane SE, et al. Among authors: clements je.J Virol. 1988 Aug;62(8):2680-5. doi: 10.1128/JVI.62.8.2680-2685.1988.J Virol. 1988.PMID: 2455817Free PMC article.