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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.
Moriones E, Navas-Castillo J.Moriones E, et al.Virus Res. 2000 Nov;71(1-2):123-34. doi: 10.1016/s0168-1702(00)00193-3.Virus Res. 2000.PMID: 11137167Review.