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Colds

Colds Overview

The cold is the most commonly occurring illness in the entire world, with more than 1 billion colds per year reported in the United States alone. The common cold is a self-limiting illness caused by any 1 of more than 200 viruses.

The common cold produces mild symptoms usually lasting only 5-10 days. In contrast, the "flu" (influenza), which is caused by a different class of virus, can have severe symptoms.



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Colds

Croup Overview

Croup is caused by an acute viral infection of the upper respiratory tract. It is also called laryngotracheobronchitis since it affects the larynx, trachea, and bronchi. This infection results in inflammation, increased mucus production, and swelling of the upper airways. Although croup usually resolves on its own, between 5%-10% of children with croup will require admission to the hospital.

  • Children between the ages of 6 months and 3 years are most likely to get croup. This common viral illness is estimated to occur annually in 3%-5% of children between the ages of 6 months and 3 years and is the most common cause of stridor (upper airway wheezing during inspiration) in this age group. Croup is rarely seen in adults because their larger breathing passages (trachea and larynx) can accommodate the inflammation without producing symptoms.


  • Some children appear to be particularly prone to croup and have a number of ...

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Read What Your Physician is Reading on eMedicine

Rhinoviruses »

The common cold is an acute respiratory tract infection (ARTI) characterized by mild coryzal symptoms, rhinorrhea, nasal obstruction, and sneezing.

Read More on eMedicine »

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