Allan has worked on Infectious diseases since 1979. Before retiring in January 2020, he was the Institute Director of the GSK Vaccines institute for Global Health in Siena, Italy since its inception in 2007, directing a program to take vaccines for developing countries from laboratory concept though pilot scale production to proof of concept for Typhi, Paratyphi A, shigella, invasive nontyphoidal salmonella and Group A streptococcus.
Prior to his appointment as Director of GVGH, he had more than 25 years’ experience working on the development of experimental malaria vaccines, field work in epidemiology and testing control programs for malaria in endemic countries, as well as laboratory-based research in antigen identification of potential protective immune responses. He held previous appointments at the National Institutes of Health (NIH), USA, where he was the co-branch chief of the Malaria Vaccine Development Branch and at the Queensland Institute of Medical Research (QIMR) in Brisbane, Australia and as a Professor in the joint QIMR/University of Queensland, Australian Centre for Tropical Health and Nutrition, where he worked on malaria control programs in several Asian countries, including a major program to develop sustainable, community-based control programs in the Philippines.
Over 40 years he has been a key part of 25 vaccine trials in Australia, USA, Europe, Papua New Guinea, South Asia, The Philippines and Africa.
He is currently an Honorary Professor at the Burnet Institute in Melbourne Australia where he continues his interest in delivering solutions to infectious diseases to population in greatest need.