Statistical Considerations: Statistical analysis will be done after completion of the project, epidemiological statistics including: Calculate the percentage of Nasopharyngeal Carriage with vaccine type and non vaccine type at each time of isolation from each newborn, resistance to antibiotics (percentage of resistance, MIC50, MIC90 and range): demographic analysis for age, sex, and others like presence of a child within the house who attends school, socio-economical level, antibiotic use before the last 30 days, sleeping room- alone or with siblings and presence of a smoker in the house.