The relationship between RSV infection in infancy and development of childhood asthma has been unclear. Now a study has examined the effects of RSV infections of all different severities on childhood asthma risk at a population level. The findings showed an age-dependent association between RSV infection during infancy and childhood asthma. The link is explained in part by shared heredity to both severe RSV and asthma. To definitively establish causality, the effect of interventions that prevent, delay or decrease the severity of the initial RSV infection on childhood asthma will need to be studied.
Several major childhood allergies may share a common link to bacteria in the human infant gut, according to a study that identified gut microbiome features and early life influences associated with children developing allergies by age five. The current study is one of the first to examine four distinct school-aged pediatric allergies simultaneously: atopic dermatitis (eczema), asthma, food allergy and allergic rhinitis (hay fever). Researchers found a common breakdown in protective mechanisms in babies prior to the development of allergies. In addition, the research team examined how various influences affected the balance of gut microbiota and the development of allergies.