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Sigurs et al recently published their 18-year prospective controlled follow-up study of 47 subjects hospitalised for respiratory syncytial virus (RSV) bronchiolitis at age <12 months.1 In the cohort the prevalence of wheezing and asthma was higher than in population-based controls at 3, 7 and 13 years of age.
Asthma was present, depending on definition, in 33–39% of 46 study subjects and in 7–9% of 92 controls,1 in line with an asthma prevalence of 9.5% in Swedish young adults.2 The risk of adulthood asthma after RSV bronchiolitis was therefore 3.5–4.1-fold compared with …
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