Assessing the Clinical and Socioeconomic Burden of Respiratory Syncytial Virus in Children Aged Under 5 Years in Primary Care: Protocol for a Prospective Cohort Study in England an... oleh Uy Hoang, Elizabeth Button, Miguel Armstrong, Cecilia Okusi, Joanna Ellis, Maria Zambon, Sneha Anand, Gayathri Delanerolle, F D Richard Hobbs, Jojanneke van Summeren, John Paget, Simon de Lusignan