Professor Margaret Johnson is the clinical director of the Royal Free Centre for HIV medicine and is Professor of HIV Medicine at University College London. She has been involved in the management of women with HIV infection since 1989 when she was appointed the first HIV physician in the UK. One of her first projects on appointment was the development of a designated HIV clinic for women. More recently she chaired the British HIV Association from 2004 to 2008. Together with Professor Jane Anderson she has chaired BHIVA guidelines for the management of women with HIV.