Murphy, G.P., Garry, C., Van Baarsel, S., Coleman, T., Shovlin, B., Fogarty, C., Williams, C., Lang, P., Casey, C., Leonard, L., Ovryakh, N., Murphy, P.G., Breen, P. and Linnane, S. 2021. COVID-19 seroprevalence in primary and secondary healthcare workers (HCWs). International Journal of Infection Control. 17, 1 (Dec. 2021). DOI:https://doi.org/10.3396/ijic.v17.21784.