Viral infection facts

How these diseases grow

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Viral Infections

A virus is a small infectious organism--much smaller than a fungus or bacterium--that causes disease. Probably the most common viral infections are those of the nose, throat, and airways, including sore throat, sinusitis, the common cold, and influenza. Doctors often refer to these as upper respiratory infections (URIs). In small children, viruses also commonly cause croup and inflammation of the windpipe (laryngitis) or other airways deeper inside the lungs (such as bronchiolitis and bronchitis). Some viruses, such as rabies, West Nile virus, and several different encephalitis viruses, infect the nervous system. Others develop in the skin, sometimes resulting in warts or other blemishes. Additionally, many viruses commonly infect infants and children. How a virus grows: A virus must invade a living cell to reproduce (replicate). The virus attaches to a cell, enters it, and releases its DNA or RNA inside the cell. The virus' DNA or RNA is the genetic code containing the information neede Read more at www.altmeds.com

 

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