Effectiveness of the 13-valent pneumococcal conjugate vaccine against invasive pneumococcal disease in South African children: A case-control study

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Effectiveness of the 13-valent pneumococcal conjugate vaccine against invasive pneumococcal disease in South African children: A case-control study

The Lancet Global Health

http://www.thelancet.com/journals/langlo/article/PIIS2214-109X(17)30043-8/fulltext