[1] She is a specialist in bacterial infection, respiratory co-infection, mucosal immunology and vaccine responses.

She is currently Professor of Respiratory Infection and Vaccinology at the Oxford Vaccine Group in the Department of Paediatrics at the University of Oxford and the Director of the Liverpool Vaccine Group at the Liverpool School of Tropical Medicine.

[2][3] She leads a team of scientists studying protective immune responses against pneumococcus [4] and other respiratory pathogens such as SARS-CoV2.

[10] Ferreira joined the Respiratory Infection group at Liverpool School of Tropical Medicine as a postdoctoral fellow in December 2009 and together with Prof. Stephen Gordon led the development of an Experimental Human Pneumococcal Nasopharyngeal Colonization Model.

Ferreira was appointed Professor and subsequent Head of Department of Clinical Sciences in 2018.