The hygiene hypothesis revised – pro, con, or…?
Symposium Chairs: I. Annesi Maesano (Villejuif, France), E. von Mutius (Munich, Germany)
Aims: At the end of this symposium, the participants should have a clearer view on the current thinking about the validity of the ?hygiene hypothesis?, and the role of early-life exposures to microorganisms and Westernised lifestyle environments in the aetiology and pathogenesis of asthma.