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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 sneezing. Contact with infected people, especially through kissing and sex. Contact with contaminated surfaces, food, and water.
A viral infection is a proliferation of a harmful virus inside the body. Viruses cannot reproduce without the assistance of a host. Viruses infect a host by introducing their genetic material into the cells and hijacking the cell's internal machinery to make more virus particles.
The primary NIH organization for research on Viral Infections is the National Institute of Allergy and Infectious Diseases Disclaimers MedlinePlus links to health information from the National Institutes of Health and other federal government agencies.
Medical Definition of Viral infection. 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. Viral infections cannot be treated with typical antibiotics ( antibacterial antibiotics);
A viral infection is a disease that can be caused by different kinds of viruses, of which the influenza-virus is best known. A viral infection can be in different places in the body, some viruses are mainly in the intestine, while others prefer the lungs and airways.
Like bacterial infections, many viral infections are also contagious. They can be spread from person to person in many of the same ways, including: