Adapting COVID-19 research infrastructure to capture influenza and RSV alongside SARS-CoV-2 in UK healthcare workers winter 2022/23: Evaluation of the SIREN Winter Pressures pilot study - Sophie Russell; Katie Munro; Sarah Foulkes; Jonathan Broad; Dominic Sparkes; Ana Atti; Jasmin Islam; Susan Hopkins; Victoria Hall; SIREN study group (PLoS ONE)