A Controlled Study to Assess Safety, Colonisation and Immunogenicity of Reconstituted Lyophilised Neisseria Lactamica

This study is part of a series of projects to develop and test new vaccines for meningitis. Previously researchers have given nose drops containing N. lactamica to over 350 volunteers, and shown that many of them (35-60%) can become colonised with N. lactamica and become resistant to becoming colonised with N.meningitidis without causing any illness or disease. In the future the study team would like to find out how N.lactamica helps children resist N.meningitidis, and develop new vaccines that exploit that mechanism.