Combination of pneumococcal surface protein A (PspA) with whole cell pertussis vaccine increases protection against pneumococcal challenge in mice.
Oliveira ML, Miyaji EN, Ferreira DM, Moreno AT, Ferreira PC, Lima FA, Santos FL, Sakauchi MA, Takata CS, Higashi HG, et al. PLoS One. 2010 May 27; 5(5):e10863. Epub 2010 May 27.