The Lancet  
Feb 11, 2012  Volume 379  Number 9815  p493 – 588
http://www.thelancet.com/journals/lancet/issue/current

Articles
Group B streptococcal disease in infants aged younger than 3 months: systematic review and meta-analysis
Karen M Edmond, Christina Kortsalioudaki, Susana Scott, Stephanie J Schrag, Anita KM Zaidi, Simon Cousens, Paul T Heath

Preview
More high-quality studies are needed to accurately estimate the global burden of group B streptococcus, especially in low-income countries. A conjugate vaccine incorporating five serotypes (Ia, Ib, II, III, V) could prevent most global group B streptococcal disease.