Bronchiolitis

Bronchiolitis is a childhood disease that affects the lungs. It occurs when a virus enters the breathing system and causes the tiny airways in the lungs to become swollen. As a result, a thick fluid called mucus collects in the airways and makes it hard for air to flow freely in the lungs. Usually, the infection goes away after 7-10 days. Some children show very mild symptoms, but in others, the disease can be severe. Older children are less at risk, and if they get bronchiolitis, they don't get as sick as younger children.