Protective Effect of Nasal Colonisation with <i>∆cps/piaA</i> and <i>∆cps/proABC</i><i>Streptococcus pneumoniae</i> Strains against Recolonisation and Invasive Infection oleh Elisa Ramos-Sevillano, Giuseppe Ercoli, José Afonso Guerra-Assunção, Philip Felgner, Rafael Ramiro de Assis, Rie Nakajima, David Goldblatt, Kevin Kweku Adjei Tetteh, Robert Simon Heyderman, Stephen Brian Gordon, Daniela Mulari Ferreria, Jeremy Stuart Brown