Definition of masked. 1  1 : marked by the use of masks a masked ball. 2  2 : failing to present or produce the usual symptoms : latent a masked infection a masked virus.
The herpes simplex virus (HSV) is a double-stranded DNA virus with an enveloped, icosahedral capsid. It is a common cause of infections of the skin and mucous membranes, manifesting itself as tiny, clear, fluid-filled blisters usually around the mouth or genitals.
1 HSV 1 usually causes herpes on the mouth. 2  People with the virus can get cold sores or fever blisters on the mouth. 3  HSV 1 can be spread to the genitals during oral sex.4  HSV2 usually causes herpes around the genitals or anus. 5  People with this virus can get sores or blisters around the genitals or anus. People with the virus can get cold sores or fever blisters on the mouth. 2  HSV 1 can be spread to the genitals during oral sex. 3  HSV2 usually causes herpes around the genitals or anus. 4  People with this virus can get sores or blisters around the genitals or anus. 5  HSV 2 can be spread to someoneâs mouth during oral sex.