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My research focuses on the study and measurement of hygiene behaviour and the development and evaluation of behaviour change interventions.

I am currently working on two clinical trials of interventions to interrupt trachoma transmission in Ethiopia. The "Stronger-SAFE trial" is a large, four-arm cluster-randomised controlled trial to test whether enhanced azithromycin treatment (two doses, two weeks apart) combined with targeted transmission-interrupting strategies (face washing and fly control) can more effectively eliminate trachoma than current approaches. I am leading the development and evaluation of the face washing intervention tested in this trial. In the FA-WASH trial we are exploring whether face washing with soap removes Chlamydia trachomatis bacteria from children's faces better than washing with just water.

My PhD research was conducted in Lusaka, Zambia and involved the design and evaluation (outcomes and process) of a multiple behaviour change intervention to control childhood diarrhoea through exclusive breastfeeding, handwashing and use of oral rehydration salts.

I have conducted formative research and been involved in several behaviour change trials in Asia (India, Indonesia, Nepal) and Africa (Zambia, Nigeria, Ethiopia, Kenya, Tanzania, Ghana).