1. When less is more: how many doses of PCV are enough?
Katherine L O'Brien 
The Lancet Infectious Diseases 
Volume 18, Issue 2, Pages (February 2018)
DOI: /S (17)
Copyright © 2018 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license Terms and Conditions

2. Figure
Countries that have introduced pneumococcal conjugate vaccine into their routine immunisation programme
PCV=pneumococcal conjugate vaccine. NIP=national immunisation programme. Figure reproduced with permission from VIEW-Hub.org on Nov 10, 2017.
The Lancet Infectious Diseases  , DOI: ( /S (17) )
Copyright © 2018 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license Terms and Conditions