The Effects of LAIV on Nasopharyngeal Bacteria in Healthy 2-4 Year Olds: a Randomized Controlled Trial

1: School of Cellular and Molecular Medicine, University of Bristol, Education Centre, Upper Maudlin Street, Bristol BS2 8AE, UK. 2: School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol, BS8 2BN. 3: Public Health Laboratory Bristol, Public Health England, Myrtle road, Bristol BS2 8EL, UK. 4: Present address: Pediatric Infectious Diseases & Immunology, Children s Hospital Reykjavik, Hringbraut 101, Reykjavik, Iceland.