Lancet Global Health
Feb 2019  Volume 7Number 2e160-e280
http://www.thelancet.com/journals/langlo/issue/current

Articles
Effect of pneumococcal conjugate vaccine introduction on childhood pneumonia mortality in Brazil: a retrospective observational study
Cynthia Schuck-Paim, Robert J Taylor, Wladimir J Alonso, Daniel M Weinberger, Lone Simonsen