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The common cold belongs to the
Upper Respiratory Tract Infection s. It is different from
Influenza , a more severe viral infection of the respiratory tract that shows the additional symptoms of rapidly rising
Fever ,
Chills , and body and
Muscle Aches . While the common cold itself is rarely life-threatening, its complications, such as
Pneumonia , can be.
es cause most common colds]]
Most common colds are caused by infection by
Rhinovirus . Other viruses causing colds are
Coronavirus ,
Human Parainfluenza Viruses ,
Human Respiratory Syncytial Virus ,
Adenovirus es,
Enterovirus es, or
Metapneumovirus .
A cold virus can infect the next person before it is defeated by the body's
Immune System . Sneezes expel a significantly larger concentration of virus "cloud" than coughing. The "cloud" is partly invisible and falls at a rate slow enough to last for hours—with part of the droplet nuclei evaporating and leaving much smaller and invisible "droplet nuclei" in the air. Droplets from turbulent sneezing or coughing or hand contact also can last for hours on surfaces, although less virus can be recovered from porous surfaces such as wood or paper towel than non-porous surfaces such as a metal bar. The incubation period (time between becoming infected
