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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.
bacterial and viral infections have many things in common both types of infections are caused by microbes bacteria and viruses respectively and spread by things such as coughing and sneezingcontact with infected people especially through kissing and sex contact with contaminated surfaces food and wateracterial and viral infections have many things in common both types of infections are caused by microbes bacteria and viruses respectively and spread by things such as coughing and sneezing