Study Status: Not yet recruiting
Recruit Status: Not yet recruiting
Study Type: Interventional
Official Title: Evaluation of PCV Schedules in a Naive Population in Vietnam
Brief Summary: The cost of pneumococcal conjugate vaccine use can be greatly reduced by making use of existing herd immunity to protect children against vaccine type pneumococci. The investigators will reduce the circulation of vaccine type pneumococci to low levels by PCV catch-up campaign; vaccinating all children less than 3 years of age with PCV, after which the investigators will evaluate the ability of a simplified two doses regimen and an alternative one dose regimen to prevent the reintroduction of vaccine type pneumococci compared to the WHO recommended 2 doses schedule.