Fig. 1
From: A systematic review of the burden of vaccine preventable pneumococcal disease in UK adults

Process of literature review. Abbreviations UK = United Kingdom, RCT = randomized controlled trial, Pn = pneumococcal VT = vaccine type
From: A systematic review of the burden of vaccine preventable pneumococcal disease in UK adults
Process of literature review. Abbreviations UK = United Kingdom, RCT = randomized controlled trial, Pn = pneumococcal VT = vaccine type