Role of bacterial lysates in asthma, evidence and projection with special reference to OM-85 There are several bacterial lysates, being OM-85 (Broncho-Vaxom ®) the one with the greatest evidence regarding its immunoprotective role on respiratory infections in the pediatric population. Its mechanisms of action produce immunomodulatory effects that could potentially prevent asthma in early stages of life, act on the reduction of crisis and be a contribution to conventional asthma therapy. This article shows the main evidences in relation to these compounds, the current focus and future development, especially on OM-85.