Primary and Secondary Efficacy Endpoints: The frequency of NP carriage, serotype distribution and antimicrobial resistance patterns of the strains in infants less than 2 years old who are not attending daily care centers, who live in rural areas. As there is no truly efficacy in this project, determination and assessment of the reduction in vaccine type pneumococcal carriage as a result of vaccination, so that in this project we will model the impact of a routine program with the 7v PCV based on the serotype coverage in the country. known documented effectiveness in other countries using the same schedule, since it is well known that the 7v PCV can prevent. Rate of resistant strains.