554 Co-designing child health resources for primary care colleagues and families during the Covid-19 pandemic

Abstract

849 of the 992 participants in the first round returned (86%). The median time between initial and follow up collections was 62 days. Of the 849 participants, 65 had positive SARS-CoV-2 antibody tests (7.66% CI 6.05-9.64). Of the 45 participants with positive antibody tests in the first round who attended the follow-up visit mean antibody titres increased. With Roche's Elecsys assay, mean antibody titres increased from 84.7 cutoff index (COI) to 115.8 COI (difference 31.08, 95% CI 13.82-48.34, p=0.0007) and with DiaSorin's LIAI-SON assay. mean antibody titres increased from 67.5 AU/ml to 81.4 AU/ml (13.89, 0.31-27.46;p=0.0452).