Wheezing is a high-pitched, whistling noise that happens if the small airways in the lungs are narrowedThis often happens with viral infections (cough and cold) inIt is usually obvious during breathing out (expiration)In a survey, viruses were detected in up to 85% of wheezing exacerbations, in particular:RhinovirusCoronavirusInfluenza virusParainfluenza virusesRespiratory syncytial virus (RSV)Seasonal correlations between rates of upper respiratory infections (URIs) and hospital admissions for asthma
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