How is the disease diagnosed?
A healthcare provider usually takes a history of how symptoms started and then does a physical exam. Usually, the illness starts with 1 to 2 days of nasal congestion. Then breathing gradually becomes more difficult. The child may start to breathe more rapidly and may exhale more forcefully. The healthcare provider will listen for wheezing and look for trouble breathing or rapid breathing. X-rays of the chest may be taken as well.