Allan was the inaugural Institute Director of the GSK Vaccines Institute for Global from 2007 until 2019, working on vaccines for enteric diseases and Group A streptococcus.
Prior to this, Allan worked on the development of malaria vaccines, malaria epidemiology and laboratory-based research in malaria antigen identification. Allan held previous appointments as co-branch chief of the Malaria Vaccine Development Branch, NIH and at the Queensland Institute of Medical Research in Brisbane, Australia.
Allan now is active on the advisory boards of multiple international vaccine development and funding programs, especially for diseases of Low- and Middle-Income Countries.