Before joining the Health Protection Agency she held an academic post at St Mary’s Hospital Medical School in London. She became a Consultant Epidemiologist in 1994 with responsibility for the national surveillance of vaccine preventable diseases, blood-borne hepatitis and transfusion transmissible infections. Her work directly contributed to several major decisions on national vaccination policy, that, in turn have provided benefits for public health. She has also acted as a temporary advisor to WHO on vaccine preventable diseases and advises the European Centre for Disease Control on surveillance and epidemiology of vaccine preventable diseases. Dr Ramsay’s research interests involve establishing the potential role for new vaccines. Since 2009, she has been Head of the Immunisation, Hepatitis and Blood Safety Department in the Health Protection Agency and subsequently Public Health England. In this role she has continued to lead national surveillance and to demonstrate a track record in surveillance development, in managing acute investigations and in providing expert advice and support to a wide range of professionals and organisations who contribute to public health, both in England and overseas.Since April 2013, the department has taken on new functions to support the implementation and planning of national immunisation programmes and the scientific secretariat for the Joint Committee on Vaccination and Immunisation. The department has a national role in providing technical leadership to the network of local Screening and Immunisation Teams who are embedded in NHS England and have a lead role in the commissioning and provision of immunisation programmes at a local level.