The University of Hong Kong ("the HKU") is committed to meeting internationally-recognized standards of personal data privacy protection, in compliance with the requirements of the Personal Data (Privacy) Ordinance ("the Ordinance"). In doing so, it will be ensured that the Project’s staff comply with the strictest standards of security and confidentiality. The "Seroprevalence of antibodies to SARS-CoV-2 in health care workers in Hong Kong: a longitudinal study" of the School of Public Health of the HKU ("the Project"), being part of the HKU, complies with all relevant and applicable HKU privacy policies.