To establish whether there is superiority of oral BV (broncho vaxom) over placebo in the prevention of parent-reported, healthcare professional-confirmed, persistent wheeze between 19 and 24 months post initiation of IMP/placebo, after a hospital admission for severe bronchiolitis.
The goal of this clinical trial is to learn about the effects of using bacterial lysate in bronchiolitis. The main question it aims to answer are:~Does the use of bacterial lysate after bronchiolitis reduce the likelihood of preschool wheeze~Participants will take either the active medicine or a placebo for 24 months.