She's an old friend who just remembered my good memory. It is Bordetella pertussis, a bacterium that has all the hair to scratch, because it is responsible for whooping cough. Pertussis, a child's disease, is characterized by a dry, noisy cough, resembling the rooster's singing (hence the name, like what science sometimes… finally let's go!) Short illness of the child against which we are protected by a vaccine developed in the years 1940 in the United States then introduced in France in 1959 in an isolated presentation then quickly combined with the diphtheria tetanus polio vaccine in 1966: the "Tetracoq" . Currently, our beloved toddlers even receive the PENTACOQ in which the protection against Haemophilus influenzae has been added. Anyway, everything was going for the best. Except….