Judith Allen is Professor of Immunobiology at the University of Manchester and is the leading expert on macrophages activated by the immune system during helminth infection. Her lab was one of the first to define a macrophage activation phenotype uniquely associated with Th2-type immunity in vivo and to investigate links between macrophage function and tissue repair. She is highly collaborative across Europe, Asia and the Americas, placing her at the international interface of different disciplines that contribute to our understanding of macrophage biology. Professor Allen makes a major contribution to wider science through her membership of grant awarding committees and her editorial board roles.