Mallol J, et al. - Using data obtained from two surveys (S1 and S2, in 2005 and 2012, respectively) administered seven years apart, researchers conducted a cross-sectional, international, population-based study to identify changes in the prevalence and severity of recurrent wheezing (RW) in infants (aged 12–15 months). The data presented in this work showed a significant increase in admissions for wheezing. The prevalence of asthma diagnosed by doctors and the use of inhaled corticosteroids and oral antileukotrienes increased significantly in Curitiba and São Paulo. The prevalence and severity of RW in the first year of life remained high over time, with remarkably high rates of Emergency Department (ED) visits, wheezing admissions and asthma drug use. This investigation suggests that early diagnosis of asthma and appropriate treatment for infants with recurrent and severe symptoms of asthma should be considered.