Objective: Describe the epidemiological and clinical pattern of Bordetella pertussis infection (whooping cough) among hospitalised infants less than one year-old in a paediatric ho(1) vacunas(1) Introduction: Malaria is considered to be the fourth leading cause of infant mortality after pneumonia, complications related to premature birth, and perinatal asphyxia.(1) Adolescent(1) Adolescente(1) Introduction: Pertussis is a respiratory infection caused by bacteria of the genus Bordetella, mainly pertussis and parapertussis species. Despite the high vaccination coverage in (1) risk groups(1) immunization schedule(1) Calendario de inmunización(1) Vaccines(1) grupos de riesgo(1)