intermittent use of high-dose ICS (1,600–3,200 μg/day BDP or BUD) as evidenced by a reduction in the severity of symptoms. There was also a trend for reduced requirements of oral corticosteroids. More recently, a controlled, randomised, double-blind clinical trial of 750 μg FP versus placebo twice daily in 129 children who were 1–6 year of age with recurrent virus-induced wheezing showed a reduction in the use of rescue oral corticosteroids in the FP-treated patients [24]. However, treatment with FP was associated with a smaller gain in height and weight. Among preschool children, no benefit was shown for continuous low-dose ICS treatment (400 μg/day BUD) with respect to a reduction in the number or the severity of wheezing episodes [75]. Finally, a double-blind, placebo-controlled, randomised interventional study, primarily designed to assess whether or not treatment with intermittent courses of inhaled budesonide (400 μg/day) versus placebo for 2 weeks during wheezing episodes could delay progression to persistent wheezing, did not show any benefit of ICS during the first 3 years of life [11