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A narrowing of the smallest airways in the lung (bronchioles) causes wheezing. This narrowing results from swelling caused by a virus. The respiratory syncytial virus (RSV) causes most bronchiolitis.
Don't call 911. Don't put anything in your child's mouth. It could cause choking or vomiting. Never shake your baby. It can cause bleeding in the brain. Don't Give In After the Spell: Some ...