Her research interests include adoptive breastfeeding, long-term breastfeeding, non-nutritional aspects of breastfeeding, child protection and breastfeeding, peer-to-peer milk sharing and models of care for traumatised children. Karleen speaks and publishes widely on these subjects to lay and professional audiences. Karleen is active in research, policy development, advocacy and teaching in the areas of infant feeding in emergencies and the marketing of infant formula. She is also an Australian Breastfeeding Association Community Educator and Breastfeeding Counsellor.