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Viral infection: Infection caused by the presence of a virus in the body. Depending on the virus and the person's state of health, various viruses can infect almost any type of body tissue, from the brain to the skin.iral infections cannot be treated with typical antibiotics (antibacterial antibiotics); in fact, in some cases the use of antibacterial antibiotics may cause side-effects that complicate the viral infection.
It means a wildly popular video. Viral is the adjective form of the noun virus.. Something that's viral is figuratively something that spread from person to person the way â¦ a virus spreads a sickness such as a cold or flu.Everyone sent the video to their friends until thousands or millions were watching it.iral means pertaining to or caused by a virus. It means spreading quickly over a short amount of time.