Clinical Research Directory

Inclusion Criteria:in * Infants between 4 and 9 months of age followed up in the participating Maternal and Child Protection Services for the fourth and ninth-month mandatory vaccinations * Availability of a personnel telephone for at least one parent * Information to the parents for data collection and the active follow-up of the child until 36 months and express consent to participate in the research * Affiliation to a social security system or benefiting from the Medical assistance of the state * Mastery of a minimum of French according to the principal investigator or the presence of a French-speaking relative Exclusion Criteria: * Infant with a severe neurological pathology such as encephalopathy * Refusal to participate in the study