[Recurrent asthmatic bronchitis in the first years of life: a 3-year follow-up].

The natural history of asthma is not well known; its origin may go back to just after the birth. The aims of this study are: 1) studying the evolution of the symptomatology of a group of children suffering from recurrent asthmatic bronchitis of a moderate-severe level in the first two years of life; 2) inquiring some risk factors conditioning the evolution of it. One hundred children, aged from 16.